I finally decided that my current computer (Core 2 Duo E6750) was just not keeping up with the demands put on it (i.e. World of Warcraft with nUI installed) but my budget isn't currently up to replacing it with the Core i7 of my dreams. However, my budget was up to buying a Zalman CNPS10X Quiet cpu heatsink/fan, which is allowing me to overclock my processor from the stock 2.66 GHz up to 3.4 GHz - a 27.8% improvement. I'm currently running Prime95 to see if it will hold up - so far so good. The core temperature is remaining steady at 52 degrees C, which is well in the safe zone.
One warning - the CNPS10X is HUGE - if you're interested in it, make sure you have a big case :)