Regardless of what else you might say about them, you can't take it away from Dell when it comes to their design team. Especially their notebook designers.
I guess if I were going to issue any warnings, it would be to choose well before buying, since there's such a wide range of options available. The good ones aren't cheap though, unless you buy one stripped down. By the good ones, I mean the Inspiron 5000 & 8000 or the Latitude C or CPx series
If you don't mind buying refurbed, you can sometimes get a good deal on the Inspiron 7500 (my all-time favorite Dell - I wish they still made them) decked out with a 15.4" LCD, a 750Mhz P3 and all the goodies. Get it from the DFO though, 'cause the 3rd party resellers won't back it up like Dell will.
Good luck!