Looking for 80mm cooler

I recently built a new computer:

quad core i5 (3550p I think?)

16GB Corsair Dominator RAM

Sabertooth z77, etc

 

Anyway, I got the Xigmatek Dark Knight CPU cooler, which is massive, so massive that it does not fit in my case, which is a 4U rackmount case, it literally sticks out maybe 1 or 2 mm, but the CPU is definitely not something I want the panel to be pushing on. Moral of the story, due to the cases limitations, I'm looking for a closed loop cooler, much like the Corsair H100 type of coolers, BUT am limited to either single or dual 80mm fans/radiator. I've seen the radiators stand alone, but would really prefer it be prefab to keep cost down. Anyone know of anything like this that isn't almost $200?

First of all, why such a nice motherboard for a locked CPU?

However. your best bet is the Noctua NH-L12. It isn't 80mm, but it is still tiny enough for a 4U rack.

I didn't plan on building some crazy computer, just a basic build with the stuff I found that I liked, it all runs great and I don't plan on overclocking.

I've seen a lot of recommendations for that Noctua, however I think it's butt ugly and wouldn't want it screwing up my asthetics, not really important but it's something I care about. Thanks though, I appreciate any opinions. I know there are plenty of smaller options, but ideally want to go with something like I mentioned above.

It's not like you have a window in a 4U rack! Get a different 120mm fan for it, and be done, something like a Scythe Gentle Typhoon, or Corsair SP120 Quiet.