I have a Mac Mini, and I love it. It is better built than a PC, doesn't break nearly as much, and all around runs smoother, in my opinion. However it has downsides, it doesn't have all the applications that Windows has, and it isn't good for gaming, but for recreation is dominates over the PC. Macs are more for artists or musicians or plain recreation, while PCs are more driven to the work side of things. Though the Mac can do work stuff well too. I have Microsoft Office for my Mac, and I do all my school work on it.
Overall I would recommend a Mac over a PC, but it is your choice.
But of course we know how good Vista is over Leopard, that is one thing to consider... hahaha