Interesting that you suggest that one because i had my eye on the ThermalRight XP-120, but i know of a setup with a Asus A8N-premium and a ThermalRight XP-120 with the Corsair 2GB DDR XMS3500LL Pro TwinX that it just clears the first slot by a couple of millimeters.
And since the A8N32 cpu socket sits even closer to the memory sockets, i think there could be issues.