Forget the advice from "some guy at the store." Wood conditioners are meant to prevent splotching, but they do a poor job at that. Stains are of two basic types - Pigments : finely ground powders - Dyes : chemicals that are dissolved Think of third grade science where you put dirt in a jar of water and shook it and sugar in a jar of water and shook it. What was the difference the next day? The dirt mostly settled out to the bottom. The sugar remained in solution. Pigments work like the dirt and dye like the sugar. The big contrast comes about because the earlywood (large pores) get a lot of pigment in them and the latewood (hard and smooth), does not absorb so much because it's wiped off. Dyes, on the other hand will absorb more evenly and reduce the contrast (at least color wise). So, what you want is a dye. Problem is, Minwax stains are sometimes dyes, sometimes pigments, and often both. They don't tell you. I suggest looking up Bob Flexner's "Understanding Wood Finishing" at your local library, where he shows photos of oak dyed on one half and pigmented on the other. Then get some scrap of oak and test out your intended products and processes on the scrap before starting on your newel post. It's easier to not make a mistake than it is to recover from one. You can get dyes at most woodworking stores such as Rockler and Woodcraft, or via mail order. You can control the concentration by how much dye you add to solvent (distilled water in most cases). So you might want to mix up a series of concentrations and apply each to see the resulting color. But to see the true color, you will have to apply the finish coats as finishes intensify the stain colors.

Honestly, people were just hardier in days of yore. My very scary, steep, hardwood floor staircase in my 1913 bungalow had no signs of ever having a handrail. I installed one for ME, no kids involved. I had a handyman put up one that looked just like Marie's above. When I moved from that house, I took it off to get my furniture down. Pretty simple actually. To be honest I would not use a velvet or other rope. I need something to really grab onto if I slip on the hardwood floors; not something that could rip or pull away. Oh, I also found that investing in non-slip socks is a must!

A curio cabinet wall with three equal sections, each with a solid glass front facing the downstairs and solid wood cabinet doors on the back to access the place where you can store and display family treasures -- lockable if the family treasures are valuable. -- A curio cabinet there would be easily accessible so that what is displayed can be changed with the seasons or your mood and enclosed so you don't have to dust each piece. You could even add drawers (top and/or bottom) for things that fit in them that you keep but don't want to display. (Maybe that small foreign coin collection from your travels or the state quarters or the inherited jewelry that you never wear but that you keep for the memories.

"I thought I wanted super plain wood railings and basic square balusters." Go with your first gut-level instinct and find something that best complements the design style of your house. I've always found that to be the best choice in the end. The 4th and 6th photos from the top are closest to that idea, and I like it.