Walmart?
Seriously, sounds like you should decide who you're most comfortable with then weed out based on features. There are only a few laptop manufacturers. Major brands just apply their label & route your support calls to the appropriate support center. Buy a Compaq and you may be calling the same center as customers of Dell, Fujitsu, etc. who sell the same box with a different tag.
Here's an incomplete x-ref of resellers to actual manufacturers (ODM's):
http://tuxmobil.org/laptop_oem.html
Last I looked Alienware and Voodoo were(expensive) rebadged Clevo boxes. The reseller to ODM relationships change frequently so it isn't easy to keep track.