I desparately want to go back to Macintosh after a 10 year hiatus, but there are many programs that I use on a PC that aren't available on Macs. I've read some of the other virtual PC threads, but no solid reviews or reactions to the program itself. How does it run? If one would need to render 3D using a non-mac program (like rhinoceros), will it run? Will it run and render at a reasonable speed? Do proprietary PC programs work well? Thanks...and I don't want to have to buy a Dell .