Or get one 4870 and wait later on down the road for another one for crossfire because you can't afford a 4870x2 atm. I'm sure the 4870s will drop in price in about 6 months eh?
EDIT: Wait wait... 1337 JohnN, I totally forgot about the 4850X2. That thing's only $100 more than an ASUS 4870DK. What's the scoop on that card? Sorry for hi-jacking this thread. Lemme know if it gets out of hand and I'll bump my previous thread.