I bought the E6600, you don't have to buy an E6700 because with a little overclock the E6600 gives more performance for it's value 
Specs: Intel Core 2 Duo E6600 @3GHz // 2GB G.Skill PC6400 CL3 // Intel BadAxe // XFX 79000GTX XXX //...
Cooled by modded Asetek Waterchill