just get the scythe ninja u wont regret it, then just get a 120mm fan and put it so that it blows air through the heatsink then the exhaust fan on the back sucks the hot air out, just like this http://radekhulan.cz/img/abit-a8n/v-pocitaci.jpg
ASUS P6X58D premium | i7 920 D0 @ 4.2GHz | Corsair XMS3 6GB | MSI GTX460 HAWK | OCZ vertex 2 SSD | Coolermaster HAF X case
Yeah, and because it occasionally hung over the RAM (on certain motherboards), taking out the RAM meant having to remove the heatsink first. The good thing was that your RAM had active cooling though.
Thats not the reason they discontinued the XP-120. The discontinued it because of the caps around the socket. The fins on the XP-120 were connected to the best so they would extend out over the socket and hit caps around the socket. This would cause major cleareance problems so they decided to remove the fins and rename it to the SI-120. The XP-120 performs better than the SI-120.