The latest Parallels version 5160 is not only very very fast, but very very stable and uses much less resources than Fusion, while doing a thousand things more. Compared to Parallels the graphics of Fusion are 1/3 of the speed in any condition. Coherence in 5160 offers all the eye-candy, plus it's at least 3 times faster and less buggy that Unity. For the first time, Parallels beats Fusion in CPU tests. Amazing. And don't listen about the 2 CPUs for Fusion, it actually makes it even more slow. UI and graphics, it's not comparable. CPU strain: Parallels 5160 idles at 4 to 5 %, Fusion at 9-10. Memory: Again under the same configuration Parallels is less resource hungry and more optimized. Network: In my domain when I try to copy a file to or from my network, it takes Parallels 4 times less to copy. What can I say. The latest Parallels is the first one that has everything, is reliable and fast, and it kills the competition hands down. As for the latest Fusion DX9 enabled beta, it is so slow it reminds me of VirtualPC on my G5 the old days. Congrats Parallels, keep up the good work.