If you have the cash to buy an fx55 and sli/x850, i would suggest looking at
this. nikhsub has one
here.
you can fit a double, triple, or multiple single radiators. It is big, heavy and expensive, but perfect for water cooling. Then again the MSRP of the v2000 is aroung 250-270 in the states, so whats a hundred dollars. plus the exchange rates are heavily in your favor.