Need a new laptop. help?

I need a new laptop. it needs to be good at gaming with a good processer and it needs to be affordable so my mom doesnt faint. i am currently using a dell xps m1710 and like this series. i looked into alienware and they were a little to pricey. i would prefer a dell, hard drive size and ram dont matter, i can upgrade them later. i would like a desktop replacement laptop. please reply quickly.