I do understand people's concerns of needing certain software (although this is taken care of through a program called parallels) and/or the price of the mac hardware, but there are a lot of people who just want a computer to do simple things and have it do it steadily over the course of a few years and I think a mac does that for you.
Nanner split: have you tried Bits on wheels? I find that to be a good torrent program.