Rifle kits are cheap, I have had two PSA BCGs that I had to replace the extractor on, spotty accuracy with their barrels and had one upper that would only fit on the PSA lower it came with.
I have helped assemble several of the CDNN kits for friends, they have either used Anderson, Aero or PSA lowers and had no issues with fit or function.
CDNN offers kits as well, I just didn't bother looking.
AR15 Discount, CDNN, Joe Bob's, Arm or Ally, Right to Bear and a host of others have kits less the lower. Check the Equipment Exchange over on AR15.com for vendor specials.
It sounds like you are set on the PSA kit, so knock yourself out.
Buy an oopsie kit, a bolt, barrel and a spare upper receiver and save a ton of money. As long as you run quality ammo and reloads, there is little that can go wrong with the lower.
I don't buy kits or assembled receivers for my self, I have certain criteria for each build, other than handguard, barrel, grip and stock, I do not deviate. I seldom have issues with feed, function and ejection. I also never use an adjustable gas block and haven't had issues because of it.
