Don't know anything about your style, tastes, décor so I can't make any specific recommendations. Check out Possini company.

I sympathize with your search. I did not know what to do for my new guest room. I wanted to upgrade from the builder's square glass fixture. There was not much out there unless you are up for spending $$$$

This is not true above; In fact, some of the more decent flush can be had with abundant light at very palatable pricing. Depends how much you want to NOTICE it. But you hardly have to suffer a big box store plastic dome with a rim at 19.99
99.00 below to 169.00 crystal. All Amazon Prime

Flush mounts are generally decent price point but we need to know a bit more about you and what you want from the light without info you get just a bunch of babble.

I have 2 flush mounts and one semi flash mount..all of these are vintage because everything i really liked new cost too much.

the semi flush is very cool Murano glass bought from Italy..the most expensive too-but I felt hard for it and gave it much thought. It's in the family room. To me it's not over the top, but it's not a light that one doesn't notice. I disliked big expanse of ceiling in that longer room, so it helps to break it. It's a very cozy light.

the two flush mounts went in two bedrooms(we have four altogether) and were very cheap..in comparison to what else i saw and liked. 40 or so bucks for each one. Both of them have character, one, frankly, is a bit strange..:) But it's a rose glass..everybody feels beautiful in that light, so I put it in the guest room. I'm gathering crystals for it ever since..it's supposed to have crystals that were gone by the time I found it.

I have a bit of a problem of attaching pics lately, so if I'm able to find whatever I have on my computer already-I'll try, but I can't take any new pics and download them.

Now, when I was looking for lights for the house, it was two-three years ago..very limited choice of flash and semi-flash mounts(again talking of quality/cost correlation that seemed fair to me). Since then they (the manufacturers) seemed to improve and have a wider choice of lights.

Sites like OneKingsLane and Gilt can carry many interesting lights but check their return policy-would vary depnding on a brand. Shades of Light is a nice site. Antropologie can have one or two flush mounts or semi flush mounts, that I'd check to see whether I like it, since their return policy and customer service is good, and you never want to be stuck with something heavier and bigger you have to ship back. Wherever you look check on policies first and foremost. It can be free shipping but then some sites charge return shipping and restocking fees if you send it back.

But my preference would still be sourcing out vintage, because manufacturers did much better job back then. For same quality and finish I'd have to pay now significantly more. Also individual sellers care a lot about feedback, and usually do a great and very personal job of answering your questions and packing the lights. All my experiences were mostly very positive.

My sources were Etsy, eBay and local Craigslist. But there are other sites too, obviously, they just tend to be more expensive.

Knowing your style would help a lot, as mentioned by previous posters. Would help to make specific suggestions.

I have 3 Thurman ceiling mount lights from Rejuvenation in my hall, with 9 ft ceilings. They replaced world’s most hideous fixtures that you can still buy at HD. These are wonderful and provide the most luscious light. But it all depends on what look you’re after.

Thurman light