you cant run os x on pc.
i posted about mac vs pc editing/loading large graphic files ( 300dpi files @ 3x4in and up ) a while back. my laptop ( powerpc 1.42 ghz ) handled loading the graphics better than my 3.2 ghz pc. so much so that while working on a project with huge files i did it all on the mac. my pc just took WAY too long to load / render the files for viewing. there was a pretty long wait for the files to load on my pc while they loaded instanty ( no wait at all ) on the mac. i have no idea why ...
macs are the industry standard for graphic arts.
i know very little about them right now, so i wont pretent to know anything more than what ive experienced myself.
look around here some if you want :
http://forums.macnn.com/