Originally posted by: themisfit610
Hmm...
That's tricky since without 1066fsb support, you won't be able to use any of the newer C2D's that are very cheap, fast, and overclockable... I bet your board probably could do 1333, maybe not officially. I wonder if any experienced owners of your board would care to comment?
At any case, you would possibly have to spend an extra $90 for a P35 board. It's extra, but not a huge expense...
GPU is easy - either an 8800gt or a 9600gt. The 8800 is still a little faster IIRC, and it's available for as low as $200. A 9600 GT can be found for $150 and isn't much slower.
CPU wise - a lot of people seem to have great luck with the E2160. It's basically a Core 2 Duo with less cache, and at a stock 800MHz FSB. They reportedly go to 3 GHz without much trouble - though at a 4.5x multi that means 2.4 GHz tops with your current setup. Not sure if that's worth it. Cheap CPU at less than $100 at any rate..
If you upgrade your motherboard to one that does 1333fsb (or find a way to make yours work), the E6750 seems to be a really sweet processor. It's a lot more money than the E2160 obviously, but it's very fast
It all depends on how much you can spend

I could recommend a Q6600 @ 3 GHz (including a fat HSF), and SLI'd 9800GX2's - plus the massive PSU and new motherboard that would be necessary to keep these parts happy, but that's probably not necessary or within your budget!!
More info pls
~MiSfit