I really REALLY love my Sony Vaio laptop, but you pay for the name ((meaning, good luck finding one under $800)). However, it's over 6 years old--gone through hell and back ((!!)) and has only been really serviced once or twice. Battery ((still has the original)) is shot to hell though, but I always have it plugged in anyways. I call it the Geriatric Laptop.
You should probably look into an HP/Compaq, sounds like what you're looking for: they're relatively inexpensive, hardy, and you can customize it to make it as powerful or basic as you want.
I don't recommend Dells. At all.

You should probably look into an HP/Compaq, sounds like what you're looking for: they're relatively inexpensive, hardy, and you can customize it to make it as powerful or basic as you want.
I don't recommend Dells. At all.