My latest results in a 70usd P35 mobo, well with rebate
I just installed it and it's a default run with a single GTX @ 659|2040 and the Q6600 G-0 @ 3.7Ghz. I'll likely improve it once I tweak.
I got the E because it was so cheap and I wanted to toy with a P35 until I switch to X38 and Penryn down the line. So far, I like it a lot. If Penryn and X38 don't beat what I have now well, I may just keep my setup as is.