brand name has better support, so if something braeks down, in case of Dell it will be replaced with no questions asked and within 1-2 days.
with non brand name laptop, if it breaks , you have to sent it to them, and than wait for duno how long till they fix it...
i think those are the major adv/disadvantages...
of coure , youll pay less for non brand name..
my suggestion , go to
http://istnc.com/store/products.php?cat=21, and get Asus M6bne or M6Ne (difference is one is widescreen another isn't) asus components are of very good quality, and those laptops arent so expensive, and u get a good video too (radeon 9700 pro) so you can play all contemporary games
