A little of both. I have 11 ft ceilings in a roughly 20x20 great room with 6.5 inchs. The outdoor ceilings with the 8 inch was more like 14 feet ceilings and then there is more background noise outside - and it is nice to help transmit even further since I haven't put deck or patio speakers in yet. I bet 12 feet is roughly the switch over in common practice to 8 inch. There are no absolutes and size is certainly not all that matters. But an 8 inch on 9 foot ceilings would be out of place. It is a bit like recessed cans - 6 inch on 8 foot ceilings is a bit big. I absolutely think you will be fine with 6.5 inch in your great room. You can always go bigger but going smaller would be a mess. You might think that 8 inch speakers are visuallly intrusive.

You need to define what you are trying to do. True audiophiles will have speakers that are well spaced from the room walls so that the wall is not contributing anything sonically to the spatial stage that the speakers are trying to reproduce. You will find very few 2-channel guys who will want anything to do with Dolby anything. Most true audiophiles remove as many things from the signal path to reduce/remove any possible sound signatures that they may impart. This means any sort of DSP processing (like any Dolby Surround/Digital, etc). For the larger portion of the world that is not in the esoteric world of high-end audiophiles - this isn't really a reality that we'll live with. So its a compromise of sound fidelity and reality. Dolby (nor thx) have any speaker requirements that require speakers to be "on the wall". And honestly - thx certified is really a joke certification (sort of like energy star) - its the /minimum/ specifications with which consumers can live with. There are more high-end systems without THX certification that will blow away your "THX certified" system components. Your statement isn't correct that you can't get good sound from in-walls. I will point out that high-end in wall speakers all have their own backboxes and are highly tuned to impart the soundstage with the knowledge that they are to be placed in the wall. If you want high-end - go listen to a setup of triads, Revel inwalls, or Meridian in-walls. I guarantee you that you can tell the difference between them and a $20 Pyle (which I've never heard of). Also, just for your benefit - power plays a very little part of the entire equation. Power is a logarithmic function - it takes 10x the power for double the sound. So, sending more power isn't the solution for enveloping sound. What is primary into the equation for sound is speaker efficiency. E.G if you have an 87 db speaker vs a 90db speaker (3db difference). The 87db speaker will take DOUBLE the power of the 90db speaker to output the same volume. . Taking an even larger extreme - a 94db speaker at 4 watts is the same volume as a 87db speaker at 16 watts. Speaker efficiency is key here. Some manufacturers will lower impedance to drive efficiency but that just means that a higher quality amplifier that can drive a 4ohm (or even 2ohm) load is necessary. The next thing to consider is that full range speakers sound fuller and are better able to give a better (and louder) sounding experience than cheaper limited range speakers. There is a reason why some speakers are balanced toward the higher side and get "lost" when other sounds are present and other speakers don't. Believe it not, Bose is an expert at filling sound which is why some people believe their speakers are good. In no way am I going to say Bose is a great speaker - but I will give credit that they know how to fill sound and market it like crazy. People may not like Bose, but people also realize that Bose made a clock radio that sounded better than everybody else (and more expensive). Why is it that Bose made a radio that sounded better than everybody else ? Well, they made a system that reproduced sound as people wanted to hear (richer, deeper, fuller). You want your in-wall/ceiling speakers to be the same way - otherwise you end up with cheap clock radio sounding speakers.

For anything that needs to be hardwired, RUN CONDUIT. Stnadards are always changing as technology evolves, and what works now may be obsolete in 10, 15, or 20 years. Realize that wireless is better to day than a few years ago, and will likely improve in future years too. But it's best to still hardwire some things. I still prefer hardwired speakers. In my own house, when I built I ran conduit for everything and have all my speakers hardwired. Like a previous poster, I have two 400-CD jukeboxes in my main area that can pipe music anywhere...to any room, outdoors to the pool, etc. A while ago I went over to Sonos for music. It allows my teenagers to listen to what music they want in their rooms, it allows me to listen to what music I want where I am, or my wife where she is...you can pipe different music to different rooms. Easy. It also allows you to play the same source in each room, with it synched up perfectly. The "synch" aspect may not sound important, but we have a couple of friends who have Apple wireless for "whole house" and when they simulcast music to each room, the synching can be off just a tad. Even a tenth or a quarter of a second and it sounds weird. Sonos has control apps so you can run the system with complete control from either a Sonos controller, or from a iPhone or iTouch. It's pretty slick. I prefer the Sonos over my old Niles, and that's a bold statement on my part. Sonos also allows you access to pay sources like Rhapsody and Pandora, plus internet radio. Initially I wasn't interested in that, but we signed up for Rhapsody this summer. It's pretty slick, and at $12 a month it's less than what my kids were paying for iTunes downloads. Several time this summer we'd have friends over and we'd be out at the pool, the conversation would turn to music and if I didn't have that particular song/artist on CD, I'd use my itouch or Sonos controller to call up Rhapsody and play the obscure song or artist that we were talking about. I live in CT, my in-laws were visiting from Wisconsin and my mother-in-law mentioned polka. I called up internet radio and in about 20 seconds I had the radio station from Appleton WI that they listen to back home playing polka out by the pool here in CT. It's pretty cool. Fluff to a certain extent, but the capability is there to listen to what you want when you want, with ease. And without having to do it from your computer. With Sonos, you need a "box" for each area that you want to play independent music in. Figure about $400 per box. Their S5 box is an all-in-one, it looks like a small boom box. They have other stations (ZP100) that plug into an existing stereo or theater setup and you play through those speakers. They have a third type (ZP120) that has a powered amp and you can plug your own speakers into that box. There are other options available too that may suit your needs better than Sonos. I just thought I'd toss Sonos out as an...

Baligirl -- glad to hear this!! With our current kitchen, the only way that we are able to host large gatherings is to rely on outdoor cooking, and then it's a stretch. This is why our Passover (and Rosh Hashana and other major holiday) "tradition" for the past 4 years has been to smoke the turkey, brisket, rib roast etc. (I even have a special smoker for passover foods only!) That leaves the kitchen with the unreliable oven and 4-burner stove for soup and sides. The dishes pile up (because the dishwasher is too loud to run with people in the house); our friends and family who want to help have nowhere to work (because we lack the counter space). I'm so glad that your kitchen renovation helped solve these problems for you ... it gives me hope for the future! Our goal: completion by Rosh Hashanah.