I believe the best course of action here, is to buy a megahalelm, put that sucker on top of your CPU for about $60, $30-40 used... OC that till it's knees break
... That'll remove a lot of any CPU bottlenecking you get, as the Q6600 is a beast, even in this day and age.. And it's also capable of 3.6ghz in most scenarios
Then next course of action would be to buy another 2GB of Ram, or a whole new 4GB kit entirely so you'd have plenty of overhead for that nice overclock, as well as remove any kind of memory bottleneck you could be (are) getting at 2GB...
And to finish this build up, get a GTX 560Ti or a GTX 570, and OC that till its eyes bleed... Or, go onto craigslist, and offer everyone who's selling a GTX 460 1GB $130-145 dollars, someone will sell you one (most likely). All these options will do you severe justice. If I were to recommend one though, it'd be the 570, as it's a monster at 1080p and has plenty of overclocking headroom hehehe
If you've got any money left over, I'd recommend you getting a 750W corsair PSU
But without a PSU, you're looking to spend around $300-450 with my suggestion
I hope I helped, it's good to see you still have a lot of potential left in your current build
InF3RnusEdited by InF3Rnus - 2/8/11 at 7:30am