The reason I will never buy any other laptop (only laptop) but Dell is:
1.) Price - I've done a great deal of research and Dell beats the pants off any other laptop in terms of price. My Inspiron 8600c (which I STILL love to death, btw) cost me $927 shipped and taxed (see specs below) almost a year ago (October 19 - $750 off deal) with various discounts ($750 off, $100 concession, EPP 8% off etc). The same laptop at the time cost almost TWICE the cost.
2.) The new Dells are much higher quality. My i8600c's quality is ok, but nothing like the new ones (e.g. 700m, 9300, etc...)
3.) Customer Support - Some people may disagree with me, but Dell has some of the best customer support I've ever seen in a company. The key is to know who to talk to for specific issues. I rarely deal with tech support. Having been an end-user of computer for over 20 years, if I can't diagnose the problem within a couple of hours-one day, then the item is invariably defective.
I will concede in that some of Dell's Indian-accented customer service representatives can be somewhat cantankerous, but think about it through their shoes. I've heard countless accounts of American buyers harrassing them for just trying to do their job.
4.) Dell Spare Parts. When I'm working on my i8600c, I feel relieved to know that Dell Spare Parts is there for me if I need a part or something. Try doing that for a Toshiba or (*gasp*) a Sony.
At any rate, as a budget-minded consumer and a student, Dell is my best choice for all my laptop-computing needs.
If I was stinking rich, I would probably go with a top-of-the-line IBM/Lenovo Thinkpad T43 or something.