If you dont mind overclocking that would be your best bet at this stage. core 2 quads are still fast enough to do anything with weather it be gaming, encoding video, or whatever.
+1. That's what I'm doing with my current Q6700 65nm quadcore system - going with an SSD and a more modern video card and oc. That'll get me by until both the performance Sandy Bridge models (socket 1356 and socket 2011) are out. Also hopefully desktop Bulldozer.
I hate speculation about new things that there are not released or reviewed.
Now there I disagree (and probably a lot of enthusiasts here do too). Speculation is fine as long as it is clearly noted as such. Although repetitive threads on the subject do tend to get annoying. Personally I think a mod should make and sticky the SB and BD speculative threads here, so that any new links or info are in one place for the enthusiasts to read, plus cut out the 90% repetitive stuff..