There are several longrunning threads over on MTBR about the mountain bikes. There's a forum called "
Chinertown" (China + 29er = Chiner). They all seem fairly impressed with the brands already mentioned as well as
XMIPlay and
XM Carbon Speed. Company reps post on those forums. The fat bikes seem especially popular, because the weight difference is huge. I've been eyeing XM Carbon Speed's 27.5+ frame, fork, and wheels and thinking, hmmm