Hi all, I'm considering the new iMac, fastest model, but first comparing the i7 upgrade to stock i5, and determining if it is worth another 180 euro. After researching I've come to the conclusion that there's only a few minor differences: - Faster clock speeds: 2.8 vs 2.93 (minor) - Hyperthreading support for i7 - VT-d and TXT virtualisation support for i7 In reality there's not much difference. I've found a comparison on Anandtech. http://www.anandtech.com/bench/Product/109?vs=107 Do note that the i5 model is actually a slower one, as the i5-760 wasn't in the chart. Instead I went with the 750, so the i5-i7 difference should be even smaller. As I do like to run Parallels Desktop (mostly to test websites cross-browser), I'm mostly interested to hear if the VT-d and TXT support actually makes a difference. To me, the faster clock speed and HT don't really seam all that important. If you already have 4 cores, does it help to have 8 (of which 4 virtual) ? Tell me if I'm wrong here.