I have this model bike and looking to do some upgrading of components (RS Reba Race forks and Panaracer Cinder tyres to start with). You look as though you've made a fair few changes yourself and I was wondering what you've done so far and how it has affected handling. It's looks awesome!!!
Harpenden, United Kingdom 
• Wheels:Shimano XT M756 hubs with 32h Mavic XC717 rims& ACI db spokes
• Chainset: Shimano XT HT 2 M760
• Chain:SRAM PC 991 hollow pin
• Cassette:Shimano XT 11-34
• Rear mech:Shimano XT rapid rise
• Front mech;Shimano XT
• Brakes:Shimano XT 160mm rotors (f and r)
• Levers: Shimano XT M765 dual control
• Bars: Raceface Deus
• Stem: Raceface Deus
• Headset: Cane Creek internalb
• Seatpost: Thomson Elite layback
• Saddle: Fizik Gobi
• Tyres:Schwalbe Nobby Nic 2.1 front,Schwalbe Racing Ralph rear 2.1
• Grips: ODI Cross Trainer
• Pedals:Shimano M970 XTR
• 24.1lbs
The best upgrade was the the forks.Much more control,and much better tracking.Tyres made the bike much more lively too.