I like my PC, but I want mobility. I'm considering getting a Dell XPS next year. I'd use it with my big monitor/gaming keyboard at home, and be able to take it with me during travel so that I can play WoW without having to update/re-install mods every time.
I own a Dell XPS 410 (Desktop) and I hated Dell before, but I tried it anyway, and just to say their hardware is good, but the service sucks, and I hate Dell even more now that I am a customer, plus their XPS Laptops overheat like crazy so be careful... For mobility I would pick a MacBook, good price, good specs, stable OS, and good company...
also... YOU CANNOT REFORMAT A DELL WITH THE OS DISC!!! You have to get new copy of XP/Vista or a friends disc, because the Dell ones pretend to reformat, but then spends about 2 hours during startup recovering all your old stuff, I called them, and you cannot remove this, and I have tried to, and I know what I am doing...
Dell = Computers for people who don't know/wanna know about computers... I had to drop all the Dell junk before my PC was any good, and even though I got the "best" video card they offered, I checked it out, and the stupid thing doesn't even have a fan, and over heats like crazy...
If you must go with the evil company of Microsoft, then get a HP or *build it yourself*, avoid Gateway, and Compaq (even though they are HP, but they are economy and suck really badly)... And Dell, well I have made my point...I think... I suggest Macs' OSX or Linux' Fedora 8 or Ubuntu... I mean, really, why go with an unstable OS? ...and yes, you can play WoW on both Linux and OSX...