>>973103you're talking about discipline-specific equipment for several different disciplines.
the best bike for shit you want to do seems like a long-travel AM bike with lots of slack. general consensus for 2016 is that the transition patrol is THE 1-bike-quiver bike if you live in an area with a lot of DH or are planning on traveling to DH bike parks. they start pretty cheap considering the sport you're trying to get into (3k for the low-end spec). i'm personally riding a transition scout, which is a shorter travel rig with about 2-degrees less slack on the head tube.
