What should i upgrade?

Gotbeef

Distinguished
Mar 1, 2007
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Ok, so I'm thinking of upgrading my CPU or my graphic card to perform a little better for a few games that are coming out soon. At the moment i mostly play CODMW2. I'm getting Battlefield bad company 2 and Supreme commander 2 when they come out soon.
I'm thinking of spending between $300-$400 CAD. I'd prefer if i got my stuf at http://www1.canadacomputers.com/ or http://www.pccanada.com/contact.asp or even maybe http://www.tigerdirect.ca/ (just dont like tiger direct that much because i can't tell if the store that i usually go to has it or not)

My computer is,
CPU: Q6600 @ stock 2.4ghz (G0)
MB: Striker 2 Formula
GPU: 2 - XFX Geforce 9600GT in SLI (512mb each)
RAM: 4gb
OS: Win 7
Monitor: 24" 1920x1200 (I usually try playing at native resolution)

I'd consider Overclocking the CPU, but not sure if its a good idea, i use to overclock if for a bit to 2.6 and 2.9ghz with CPU Level UP. But after a while i wasn't able to overclock it back to 2.9ghz using Cpu Level UP. Anything over 3ghz i could never do it. But i'm pretty much a noob when it comes to overclocking.

I was considering a Intel Core 2 Quad Q8400 Quad-Core Socket LGA775, 2.66 GHz, 1333 MHz FSB, 4MB L2 Cache, 45nm (Retail Box) (BX80580Q8400) for $200CADor
NEW INTEL CORE 2 QUAD Q9650 3GHz CPU SLB8W STEPPING E0 for $300CAD (that i found on ebay, but not too excited of getting it off ebay.lol)
or Sapphire ATI Radeon HD 5850 1GB GDDR5 for $336.99CAD or
a Sapphire ATI Radeon HD 5870 1GB GDDR5 for $457.99CAD

What do you guys think? The less $$$ i spend the better.