I just bought on Ebay some IC Diamond 24 Carat. It's the easiest stuff to apply. I'll post back results after i've used it.
its the hardest TC to apply,its like a damn rock! i know beacuse i bougth some and use it in my i7.
however it was the best TC i've ever used,just tooooooo expensive.i just dont know if the presure of the heatsink will be enough to spread the TC correctly in the gpu.
i mean,you dont know how thick this thing is. its just awesome!
well,i cant wait either,you'll see
just renember to clean the heatsink too,dust can be a gpu killer