Another vote for Stag. Best fit of upper and lower I've found with randomly paired receivers, all fit well with no play. Tight fit (and matching finish) has been a crap shoot with all the Bushmasters I've had.
When I ordered two a few weeks ago, I asked if they would match uppers and lowers for best fit and was told that it wasn't necessary, they all fit well. I was skeptical, but both of mine fit prefectly, no play. I have since bought two more and found the same thing.
Cosmetically, they have the best finish I've seen as well, receivers, bolt carrier ass. and small parts, all very nice (to be fair, I haven't examined a Les Baer, Wilson, Knight's or other high end AR). The hammers all show evidence of extra polishing and have the best stock trigger of any AR I've felt. The T marks on their flat tops are very cool too. You can also get the heavy buffer which has a tungsten weight substituted for one of the steel weights for more reliable extraction. They also have an extra heavy for NFA weapons.
I don't care for the logo that much, but they are beautifully made and that's what matters.
Can you tell I'm impressed? Get the Stag, you'll be glad you did.