suggestions for replacing my stock hsf's on my videocards

[addinator]

i'm running two 6800ultras in my SLI system, and i have been playing around with overclocking them, and just looking at their temps and i don't like them idlingin the low 60's. i'd like to get them a bit cooler, and then give me a little space to overclock them some. my main concern is how to replace the heatsinks, and if i have enough room.

 

[danklumpp]

I'm not sure if the Zalman's will work that close together, they wouldn't have any breathing room. I would give it a try though, they would still cool better than stock.