The Zalman HP-80A is the older version but looks very very Sexy because of its Golden Color.
The ZM-80C has a fan bracket so if your are buying this Cooler for OC, make sure you buy a ZM-OP1 Fan as well for 10 $.
Thats a total of 40 $ almost but its a beast that cool hell.
OR MAY BE YOU WANT TO BUY A THERMALTAKE GIANT III, if you are unaware.
TT has released thier Giant III which has DUAL HEATPIPES + a normal Fan + A sense less Blower Fan + Great manuals.
The TT Uses Nickel Plated copper heat pipe while the zalman uses a Gold plated Nickel Tube.
I think a Zalman ZM-80C With fans is superb + Silent But the TT Giant III Takes full points for Ultra Cooling, i havent seen the difference b/w TT and Zalman though...