a 7900GS will (should lol) oc very well.
i can get mine to 585/830 w/o artifacts.
sora gets his higher, some ridiculous gpu overclock.
i dont know how it plays oblivion with that oc on it, i dont play it (yet).
just thought i'd put that out there.
I can't believe no one said this. The E6700 isn't worth it. The E6600 is pretty much the same speed and will overclock actually higher while being a lot cheaper. Even after price cuts I don't think it will be worth it at all.
Actually..after price cuts the E6450 will be the best chip out there for your money as with the 8x multi you can hit 3.5ghz+ easily.