If it were me, I'd buy it, and replace the rad and pump with my own wares. I'd basically just be paying $100 for the water block, which is still cheaper than buying a normal 4870X2 and adding your own full-coverage block.
“What the hell did you expect? Leave Vista under the pillow and the OS fairy would make it Win7?” -El Fiendo
“And Bring Mailman back god damnit, he is the Eric Cartman of TPU” -MRCL