Please remember that any mention of competitors, hinting at competitors or offering to provide details of competitors will result in an account suspension. The full rules can be found under the 'Terms and Rules' link in the bottom right corner of your screen. Just don't mention competitors in any way, shape or form and you'll be OK.
I use a Yate Loon 120mm running at about 600rpm on mine and it has never gone over 50c.I didn't put any heatsink on the vrms just point a 120mm directly at it and it's fine.
That flat metal piece is for ATI 1900 Pro cards.
, but my screen froze the first time, and went a bit pixelated.I only stuck on the 8 heatsink things, mine has never crashed.

i could sleep with my head on my computer 
May be a bit late now, but you might find this useful:
http://forums.overclockers.co.uk/showthread.php?t=17827685