Hi all, my apologies if this thread is a little 'old hat', as in you've answered it a thousand times previous. However, I am a new Mac user and I have a specific software requirement which leads me to ask which of the three aforementioned would be best for me?! I am an architect and I will be mostly using my new imac to work on Autocad 2010 along with a couple of other windows based applications. I understand the concept of the three methods of using windows but I do not know which would provide the best performance whilst working on Autocad, without it becoming a laborious task to load it up everyday. I will be rocking dual monitors so I quite like the idea of Parallels or VMWare so that I can have Windows open on one monitor and Leopard on the other. But will this have a negative effect on the performance of Autocad? Also, which of these two is the better? Your help would be very much appreciated, thanks!