hahaha, that 9800 pro is pretty damned old
(I have one in my workstation)
the dual 6600's is pretty nice. They have problems running the 6800's together I heard. I still haven't played with it though
I have been building a lot of nice server systems lately. 4tb in storage, dual xeon, dual opteron... 300gb sata drives with 16mb cache... 6gb ram... some nice stuff
Looking at an 8U server case with 40! drive bays - sata hotswap, multi lane backplane... drool factor man!