I'm thinking XP-120, or one of the low profile zalmans. Has to be low profile what ever it is.
Guess it all depends how big a fit Newegg will give me on swaping it, as to how fast I can get a different one. For now I'm still using the stock fan/sink and with the open mesh front the thing sounds like a fricken jet on takeoff.
I really was leaning towards the passive route so I could tone down the fan noise, but this was the shortest one I could find.