I'm due for a new computer, and would like to stick with using a Mac. I have some very special needs. I need to be able to run ESRI's ArcGIS software on my new computer, but the program is only for windows. So here are my questions: 1) How possible is it to run PC software on the new Macs? I want a desktop computer. 2) Do you need any additional software to run PC programs on a Mac still? Do you still need virtual PC? If so, how well does it run (it used to be very slow). 3) Which Mac would you suggest for something like this? Thanks!