Well its about time!
im of the opinion that most watercooling parts could barely handle the load and were missaplied.
but i would never put 450 watts into that thing and expect anything close to good temperatures without screaming fans - and in that case, then why not just aircool in the first place?
i mean put some sane fans on it and go ahead and put about 200W through it, and enjoy the great temps and low noise.
sure these things are "rated" for XY.Z load temps.
but my opinion is that most of them are about double overrated.
in other words if you are going to water cool, dont put up with screaming fans and high load temps.
you should be within a few degrees of ambient and you should be able to sleep with the fans just fine. if not then the point of watercooling is missed.
to me that seems - one for your kentsfield,
and one for -each- of your 3459745KPR-ZOMG!!!WATTAGE SLI video cards.
might as well get a single 120mm rad for the chipset while youre at it...
yep, its a rant - but think about this stuff.