I hate dell laptops. There are at least 5 dells in my hall here in college, every one is basicly brand new. The screens look worse then my dads old think pad from 7+ years ago, and on top of that, it feels cheap. Screen quality is what sets most laptops apart. Sony, gateway, compaq/HP as well as several other manufactors are using a new sceen technology which makes the old style obsolite. Sony calls it Xbrite, others have there own name for it. I have a Sony Viao with it, and it honestly looks more clear then my freinds desktop monitors. The new technology is brighter, clearer, and makes the screen veiwable from any angle (old laptop screens wash out like crazy if you are not looking at it from straight on).
Anyways, if your going the PC route, go with one that has the new screen technology. Me, I am waiting for mac to get ahold of the new screen technology, then I will be buying a 12inch powerbook.