Alot of times when i get brake noise/squeal, if i just clean the rim off real good it usually helps. i use dish soap and and the scrubby side of a dish sponge. You are right about the wheels, they are a huge part of the ride and they they can be expensive! it depends on whether you want to buy new stuff or dont mind getting used/ older less expensive parts. i guess that depends on what you're trying to build it for, utility, commuting, for fun, or versatility even, etc. nice bike, try to keep fun in it whatever you build it for.