It has come time for me to replace my old rig. Built the thing myself years ago with a P4 HT 2. some odd. It still runs off of XP. I got a black Macbook and am ready to go all Mac. I plan to keep this new computer for at least 4 years as my main machine and I was just wondering is the Mac Pro worth the extra $1k? Regarding an iMac configuration is the i7 really that much better than the i5? How do they compare to the Xeon in the Pro? Or... should i wait for processor technology to make leaps and bounds into hexcore?