I've recently bought a Kona Explosif frame with the same plan, to build it up slowly with top notch componentry. Here's what I'm thinking so far
Marzocchi Marathon Race or SL forks, maybe Fox F100s
SRAM X9 or X0 rear mech with X0 shifters and front mech
XT or middleburn or raceface cranks
Egg beater pedals
Easton EA70 or carbon bars with EA70 stem & seatpin
Mavic 317 disc rims on hope XC hubs
Hope mono mini discs
Hope headset (10 year warranty!)
All of this could change though as no doubt new stuff will come out as I'm buying.
If I couldn't run discs I would go XT V's and levers with goretex cables, ran this setup in the past and they felt so smooth.