It isn't just about benchmarks, it's also about stability! I'm the same as Wabe - I use Vue on both Mac and PC platforms. I prefer, as Wabe, to do the modelling on a Mac, then send files out to a PC render farm. I have found that Vue 4 Pro crashes less on my dual G5, and that it is very fast and responsive. When it does crash (that's inevitable), it is a very quick process, and doesn't affect the rest of the OS in any way. I can relaunch immediately, no wait, and carry on. On the dual Pentium Xeon 3Ghz, it takes slightly longer to open (the same) files, and doesn't seem quite as stable. But it is a great workhorse for rendering. There are a number of reasons why it might not be as stable on the PC I use, and it could be down to the graphics card drivers. There are a limited number of gfx cards for the Mac, and therefore easier for E-On to test. There are hundreds for the PC, so less easy to test each configuration (I'm guessing here!). So - if you have fast machines (Mac and PC) I would recommend installing it on the Mac, and using the PC as a RenderCow, as stability is my main consideration... But that's just me ;-)