God.. 480cm? 4.8m?.. now that's a RADIATOR!! .. I understand what you mean though and couldn't resist..
Anyways, You've got the black ice radiators which are awsome.. Asetek use them, innovatek uses them.. Don't get tube radiators like Airplex EVO series from aqua-computer, they work, but not as good as the propper ones.. The Pro and XT series from aqua-computer though are also EXCELENT rads..
If not you've got koolance.com who also have good radiators, and 4x120mm ones.
-Bubba