Re: e8400 vs. q6600
If your just gaming get the E8400, if your using more CPU intensive programs/Multitasking I would go Q6600. Also think about what you will be using your computer for a year from now.
Macbook Pro 2.4ghs Intel Core 2 Duo, 4gigs ram
Mac Pro - 2x 3.0GHz Quad-Core Intel Xeon , 4x2gig 800MHz DDR2, 2x 1TB 7200-rpm Serial ATA 3Gb/s, NVIDIA GeForce 8800 GT 512MB