it'll run it without a hiccup. don't waste money on another PSU, that seasonic is an excellent piece of hardware.
EDIT: look
here. a beefy system with
8800GTS in SLi (that's TWO of these cards) under load (3dmark06) is using 370.9W. If all of that was on the +12V rail (which it's not), that's about 30A, which this PSU can pull off. and you're only looking at a single 8800gts, so you're clear by a long margin.