Well I've heard good things about the Vantec hsf, that with the copper ramsinks I think would be great, but then again that thermaltake heatsink looks killer with that pipe deal going on... I'll look for some reviews on both and get back to ya, but there's some info to start ya off
A lot of the reviews i was reading about this, all said great things about it.
Shows performance on the vantec 4 w/out ram sinks
Most reviews on this said that it was too big, one problem blocked the atx power connector to the mobo, got too close to capacitors, blocks the first pci slot, noisy fan, etc...
There's the best thing I could find on the giant 2...