If you do get a Mac and plan to use it heavily (e.g. bringing it to work everyday), I’d suggest getting Applecare. It will easily pay for itself the first time you have a hardware problem. Applecare is one of the few extended warranties that Consumer Reports considers worthwhile.
One thing I really like about Macs is how easy it is to connect to things in a network environment, particularly a mixed unix/windows environment. They really try harder here and can connect to pretty much everything.