Yes, rigged up pc gaming notebooks outperform powerbooks, but they also vent heat poorly, have terrible battery life and can cost even more than powerbooks (although at far greater performance.) The truth is that if you're not going to be doing any hardcore gaming or rendering there's no point on wasting money on high end technology. OS-X and jag are more secure, not more stable-- there's a difference- and that's only because there's far more incentive to destabilize xp and only true until you wise up and get a proper firewall and anti virus program, which nobody should be without in the first place. There are plenty of good free ones out there. Again it comes down to which you are more familiar with or if you're using software that requires either one. If you're going to be running demanding games then you'll have to spend tons of money on fast ram, a fast processor, a fast gpu, and a fast hdd. If you're into the mac aesthetics thing, you'll have to spend relatively more money on a powerbook.