Yipes, that's still a lot of money. And you already have a perfectly capable rig.
****, if anything I'd spend that cash on a new proc.
But I don't know about what I'm going to do though.
Not go water cooling and go with a P35 board and get the 9800X2.
Go water cooling and 780i board and get the 8800GTS G92.
I hate decisions like these.