Quality is not assosiated with nither of those companies. Only with the clueless comsumers. For me, they use crap components that aren't worth squat. Alienware uses very nice components, better then nice, top of the line. I have never heard of some of the crap dell and gateway but in there boxes besides the 3d card, processer, and sometimes sound card. Learn How to build your own computer, it might take you 3 days to learn it so you can build one, but the finish product will be 1000% better then what you would spend for a "top of the line" dell or gateway, and you will spend 100's less then buying a namebrand box.
Brooklyn, Queens, Manhattan, Staten, Uptown, what now? Lets make it happen.