@VilaTronic
Dell gets a bad rap. Dell are not bad, but they are not great either. Alienware use to be the best, but when Dell bought out Aleinware .... Alienware's quality went way down. Dell gets a bad rap for ruining alienware's previously amazing quality. Basically, Dell buys their parts in bulk from cheap bulk wholesale ... but don't always stick with the same wholesale provider ... so quality and parts within 2 Dells of the same model can vary greatly.
If you want quality now, you have to go with ASUS, Corsair, iBuyPower, or CYBERPOWERPC.
HP, Dell, and Lenovo are considered average; better for office work than gaming, but not bad. Decent budget PC's.
Avoid ACER. ACER is cheap, but designed to break down after 2 years.
Again, I'm not a gamer ... but those are the brands quality wise as I understand them.
Most hardcore gamers stick with desktop and build their own rig from the ground up. (much more power at a much cheaper price)