I wouldn't recommend getting a $400 laptop for gaming I say save your money and buy an NVidia shield gaming tablet (its basically a tablet that can run games at 1080p with no screen tearing or lag) that means 1080p angry birds
there is no decent gaming laptops but for a laptop I'd recommend the ASUS X550LNV-NB51
But for a desktop you should get this http://www.cyberpowerpc.com/system/Fall_Gaming_Special_I/ you can also customize this pc to suit your needs as a gamer