Was going to add another 4850x2 to my system but I've been doing some research on quad crossfire and it seems that the 4th gpu just doesn't scale well at all. In some cases it was 0 increase over 3. Whereas 3 gpu's still had some significant increase over 2.

So... 4850 1GB VaporX card on the way. Gonna TriFire it.

And I'm headed out in a few minutes to pick me up 4 more gig of ram. Gonna take it to 8. :10