Should mine LTC.... bitcoin is only getting about half the ROI with ASICs taking up the network.
As far as heatsinks go I'd look into the Thermalright True spirit 120M ~$35
The ~$35-40 Thermalright Macho 120 is about 150mm high too.
The SilverStone Argon Series AR01 (~$35) is also a good bet if you replace the fan that spins up to 2200RPM. http://www.silentpcreview.com/article1348-page5.html
In general any 120mm fan CPU cooler should fit.
On the high end you could fit a Phanteks or Noctua NH-D14 being careful to use fans that won't make it 10mm taller, in the case of the phanteks. Prolimatech's Megahalems and Genesis should also fit (they don't come with fans however). There's also the slightly cheaper Silverstone Heligon HE01.
Edited by AlphaC - 8/21/13 at 8:16pm