Xigmatek Dark Knight SD1283 and Loki SD963 Review @ OCC
 

At a $50 price tag, the Xigmatek Dark Knight SD1283 hangs onto the performance bracket of mid-range coolers. The Loki SD963 is a little more difficult to put it in a bracket since it only costs $20, but nevertheless it performs better than stock cooling and should work in a pinch. The SD963 would also be a great choice for someone who wanted a little better than stock and who may even want to overclock a little bit. Both coolers give me a good vibe on the price to performance ratio, so in my opinion they're both a good buy.

http://www.overclockersclub.com/revi..._sd1283_sd963/