it's a dual core processor so i don't think it would be that bad. You can watch video or play game on a single core just fine (no multitasking) and if you get a dual core, which at basic is two single core chips in one box, it should be ok right ?
And you'll want two GPU's. Too much stress on one to try and why not get at least the same kind of card, why get a worse card if price is not the factor at that point?
So just get two identical cards and you're probably set for now.