My odd little thought...
If you want to cool like its insane buy 2 of these http://www.frozencpu.com/products/9700/ex-rad-167/Swiftech_MCR420_Quiet_Power_Quad_120mm_Radiator_-_Black_MCR420-QP.html?tl=g30c95s570, and get 8 fans for each to have in a push pull configuration to complete your loop.
But, if they both can't fit in you current case invest in the http://www.caselabs-store.com/magnum-smh10/ if you want to fit exactly these RADs or if you want to go crazy get the http://www.caselabs-store.com/magnum-th10a/ if you want to do a total of 4 RADs.
Although if you want to go completely bonkers get the http://www.caselabs-store.com/magnum-tx10-d/ and pretty much fit a few car radiators and pumps to cool some stuff...