Just another tip for you:
the "M-Club" is free and instant to join, and thats a pretty good price and you don't have to deal with rebates (if you're even worried.. the MSI rebates DO come, it just takes awhile). I picked up 2 of them and have had them folding for 48 hours straight and have overclocked them to 855 core/1710 shaders (linked) and they each pull ~12k PPD (with a i7 2600k also folding on all 8). I need to tweak a bit more, but the guy who posted earlier with the PPD for cards seems to be spot on.
I've been thoroughly impressed so far with the Palit cards ability while stressed. It has also been running surprisingly cool. They both haven't gotten over 72* C (and generally stay under 70*C) the whole time.
There was some intermittent coil whine when I first started (which I've heard on numerous 460s) but it has since gone away.
Either way, that would be pretty awesome setup!