TheMike: That should be a good combo Mike, and even though this thread is huge, theres ALOT of good info in here to help you along..
If you have any questions when you get the parts just ask. If I can't help you I'm sure someone can....

charged3800z24:Your right! Changing the HT Multi really does seem to change the IMC Speed, but it is VERY squirley to say the least!!!
As far as Winrar and Everest results go the performance boost seems to be real!! I really thought I had trashed something when I went to 13x (HT) though, and the bad thing is once you raise that value there doesn't seem to be anyway to lower it again.... Once I went to 13x my performance dropped really bad, and I couldn't get the NB/IMC to come back down again by lowering the HT Multi! I tried every value from "Auto" to 5x and the NB seemed to be stuck at 2600Mhz with pitiful performance!!

By chance, I thought maybe I had trashed my memory so I installed so older DDR2 800 (instead of the 1066). It forced the system to rewrite the NVRAM and the performance came back up to some extent...

I put the 1066 Ram back in and everything came back to normal again... Whew....