I have a Dell XPS700 that is unreliable. I am weighing purchasing Alienware X51 or Dell 8700 but what I have seen both are overpriced. I'm playing mostly FPS (steam games I missed) so it does not have to be high performing but the choice on cards on the Dell is Radeon™ HD 7570 1GB GDDR5 or GeForce GT 640 1GB. Considering my own build but don;t have time (funny my old P4 rig I built years ago is still running XP albeit slowly). Suggested ideas under $1000? Build or buy?