You can't put PC's down because Dell / HP / whoever / builds (mostly) crap PC's.
I've built every PC I've owned since 98 or so... and I guarantee they would rival a Mac in terms of reliability and speed. The one I'm on now I built four years ago, and it still runs like a champ. It's ran 24 / 7 more or less the whole time, and I restart it *maybe* every couple of months... Usually just when I install something. No bsod's, no freezing, no slow downs, none of the inherent so-called Windows problems. It's much more upgradeable than a Mac, I don't have to use proprietary components, and all for 1/2 the price of a comparable Mac.
I don't have anything against Macs... Just the "Mac snobbery" that seems to surround them.
LBR; Good luck... I really haven't much advice for laptops. I've heard good things about Toshiba and Acer though. My work laptop is an IBM and it's had the shit beat out of it and keeps on ticking.