My bike: 06 KHS DJ50 with maxxis holy roller tires, avid speed dial 7 brake levers, lizard skins Peaty lock-on grips and chainstay, white jagwire ripcord cabels and housing, Gusset single speed tensioner and misfit single speed conversion, DMR v8 pedals and a Manitou splice fork (130mm). I want to later upgrade the wheel set, fork, seat and brakes. What do you think I should upgrade next?