Trek's Procaliber 9.8 SL will make you think you died and went to XC heaven. It boasts a full-carbon frame with Trek's ingenious IsoSpeed decoupler that basically makes this the speediest softtail you've ever ridden, since more comfort means more performance. Up front, the RockShox SID RL fork tracks immaculately through the toughest lines. Ditto for the tubeless DT Swiss wheel, which accelerate quickly at the slightest push of the SRAM X1/X01 1x11 drivetrain. Throw in Shimano Deore XT discs and solid Bontrager Race X Lite carbon bars, and you're on way to cross country heaven.