Q6600 SLACR or Q8200.

[Raze664]

BX80562Q6600 SLACR - GO - Intel Core 2 Quad Q6600, Kentsfield Core, S775, 2.40 GHz 1066MHz 8MB Cache, 9x Multiplier, Retail - Scan.co.uk

BX80580Q8200 - Intel Core 2 Quad Q8200, Yorkfield Core, S775, 2.33 GHz, 1333MHz, 4MB L2 Cache, 7x, Retail - Scan.co.uk

I don't actually understand whats needed more, FSB or Clockspeed & Cache.

Will Be Used For Gaming.

 

[wafflehammer]

Q6600 has better everything...go for it.

only reason Q8200 has a higher FSB is because it has a smaller multiplier

 

[Puddle Jumper]

I would get a E8400 or E8500 over either of them.

 

[Evolv]

The Q6600 is faster. But like Puddle Jumper said, your better off getting an E8400 or E8500.

Here are some charts:
Comparative Tests of Inexpensive Quad-Core Processors (page 7) - X-bit labs

You could easily overclock the E8500 to the E8600 speeds.

 

[veg1992]

q8200 is worse than a q6600..

I'd go with the Dualie route unless you are a multi-task crazed dude