Re: Mac vs. PC
What kind of user are you? If you are a regular user or an oober-nerd you'd like Mac (as its based on OpenBSD, which is linux). Opposed to what Faisal mentioned there's tons of comparable software available for Linux so you'd never be short of comparable software.
The only reason I could never migrate over completely (I do have a Mac Mini under my desk tho) is because I have to support Windows based apps and servers, and it was just too much trouble keeping with both OS's all the time (I do most of my testing off duty)