ok guys i'm new here but have been biking for 6 years...right now i have a 5 year old cannondale f900 with magura rim brakes the hs22's. I've been looking at this Airborne Cosrsair w/ rolf wheels a judy sl shock, 9spd xt rear deraileur and pretty much everything else deore.. w/ bontrager step, kore seatpost and deore crank....the guy is asking 900 and its new...the way i look at it I can upgrade to xt front deraileur race face crank and bb, as well as xt shifters and a chris king headset to replace the wtb headset..for like 600 dollars more...is this a good buy..other alternatives would be the gary fisher zigurat, the cannondale f800, a trek in that price range...or possibly this haro..that a guy in my state is selling... http://cgi.ebay.com/ws/eBayISAPI.dll...691074516&rd=1

any ideas would be much appreciated