I'm in the market for a Mountain Bike. I've looked around a lot and have ridden several bikes, except for the two that I'm considering riding. One LBS has the Tass disc for about $800. Another offers the Kona Cinder Cone for about the same and the Blast for under $700. Based on my experience trying out bikes on trails, I'd like to have disc brakes and a somewhat decent fork. Can anybody offer any opinions of these options based on experience? Thanks in advance.