I wont enter into any of the arguements here, but I did switch over to mac last year and it's been like a breath of fresh air. Initially I got very pissed off with the mac, however I was using an old machine. My only advice is that if you do get one, get one with lots of ram. As stated here, macs like you to have lots of software open, because they don't offer the clutter that comes with the windows interface.
The hardware is more reliable IMHO.
check this out if you plan to buy one;
dadako.com > buying a new PC for 2007? read on…