Upgrade opinion...

I have a budget of around 300 bucks and at first I wanted to change the case because my old case(Tsunami) is small for my new graphic card gtx285.... I had to move some hard drives to fit the graphic card. Another reason is because Thermaltake's Tsunami have pretty bad airflow and it is very hard to organize things like wires in there. Also very loud... I looked at many cases including HAF and Spedo, but I like spedo more. BUT!! as I looked through Thermaltake homepage, Big water caught my mind... Although my current case, Tsunami would seem to be even more cramped, I wanted to make my cpu run cooler(q6600 @ 3.6, currently have Zalman 9700NT as cooler)... But then AGAIN, some how I wanted to SLI in that small case... Even knowing q6600 would bottle neck it..so I'm very unsure which to upgrade.

What do you guys think?