I have an LMT upper assembly. I bought a Bravo Company charging handle with the big latch. I need a bolt carrier group.  I was going to buy an LMT BCG to match the rifle but I started reading reviews on the Daniels and Bravo company BCG's and was impressed.  Does it really make any difference which BCG I get?  Is one any better than the other?  User reviews for all three were impressive.  I am open to suggestions. Thanks.

get a Colt or FN BCG.

I have used four of the five mentioned so far (no FN) and you'll most likely be fine with any of them.

Im running a young machine BCG greased up with high temp axle grease and have over a thousand rounds through her without cleaning and shes still trucking along.