I will never touch an Alienware ever again, especially now that it is owned by Dell. There is so much bloatware and lack of customization on the machine that is insanely difficult to get around that it bogs down your machine and locks you into Dell servicing for the rest of your life. Even then, the starting price may be around 700, but to get anything in it powerful enough to be the small gaming rig that they advertise it is, you'll be spending close to 2k.
Honestly if you're looking for a good pc- hands down go Asus. They're the closesr thing you can get to apple quality in a pc. Outstanding specs and builds, highly customizable and light on the bloatware, and the last time I ever heard of one fail was.... Never. I've recommended and gotten a lot of Asus machines over time and they are beasts.