Replace XP-120 with Tuniq Tower 120?

[digitalfreak]

I currently have an Opty 165 o/c to ~2.5Ghz, using a Thermalright XP-120 w/fan for cooling. Load temps hover around 50-52c. Would replacing the XP-120 with a Tuniq Tower 120 or something else (aside from water) bring down the temps or possibly allow me to overclock a bit more at the same temp? TIA.