I'm currently considering to buy a new card, it'll be an upgrade from a 8800gt. I've been reading some reviews about these two and it seems that 4850x2 is not equivalent but a close follower of gtx 285. I know there's the issue of driver support for the 4850x2. So my question is: how good does the 4850x2 with the current ccc drivers do against a gtx 285 and is the gtx 285 worth the money? (there's about a $100 gap btw the two). Thanks in advance.