Contrary to many posts on this thread I suggest you get a Dell Inspiron series laptop. They have the best possible price/quality ratio. I work for a company as a web developer and we have about 20 Dell laptops and desktops of various ages (from brand new to 6 y.o.). No problems whatsoever. Of course, there are some minor failures, but as is with any piece of machinery or equipment, you cant expect it to work forever (except if you are employed by NASA). Also, I strongly dissuade you from going after a HP or Compaq laptop. HP should have never gone into the laptop market. Printers is their strongest point. As for their laptops, they have some mass defects, which is confirmed by my personal experience amplified by that of my friends and colleagues.
Also, laptops by Apple, Toshiba and Sony are great quality. However, they are priced higher than Dell. Thus, if funds permit break down and buy one of those. In my opinion, you will not regret.
P.S. As always there are exceptions to every rule and aberrations from every trend. Top line laptop can fail and a cheap one can last you for ages. Maintenance and care are also important.