Computer HELP!!!?

I am getting an Alienware area-51 7500 with a 512MB NVIDIA GeForce 8800 GT graphics card with an Alienware 1000 Watt Multi-GPU Approved Power Supply (so i can upgrade to dual graphics cards later) and i was wondering if a Intel Core™ 2 Quad Q6700 2.66GHz 8MB Cache 1066MHz FSB would keep my system running games for 2-3 in the future (i will not be upgrading my cpu)? if not what cpu will keep my system running advanced games at a good speed for 2-3 years?