I'm a mtb'er too! I'm running a full rigid ss 29er right now. Rim brakes ftw! I have a slx/xt 27 spd with tora u turn and juicy 3's collecting dust. I dont really like it as much as the ss for some reason. I also do cyclocross. Ridley Xbow (Tiagra).
On to the car, Congrats! great color! :P Intake and exhaust are definitely worth getting. You'll be looking at mid to low 7 sec 0-60.
Mods: TSW Trackstar 5 Wheels (16x7 +50, Stock 205 55 16 Tires) | Advance Timing | Simota SRI (CBII-657) | 20% Tint | Interlagos (VW Plaid) Interior Trim
Wishlist: MSDS Header | Racing Beat ABE