Alienware make good gaming laptops. Otherwise avoid them, and the idea that they overprice things is strange considering Dell owns them, so they would be mass producing that hardware and it would be cheaper, they do charge you extra for the fact there is a legit OS on there as well as the fact that put it all together for you, which it takes a "specialist" to do (<-- that is supposed to be funny).
But really, make it yourself, the customisation and freedom means everything.