IMO Alienware has a good concept but they either need to reduce the price a little or improve the components. If they offered the entry model with a GTX 555, it would actually be a good value. (The GTX 555 has 288 cores and a 192 bit bus, it is a GTX 560 with one additional group of cores and a memory controller disabled) As it is, you can get a build from CyberPower with an i3 2100 and a GTX 550ti for $693 (including Windows 7), but the Alienware has the compactness and build quality on its side. Alienware just needs to improve the price/performance ratio and it could have a major effect on the market.
The cyberpower build (tell me if you can get it any cheaper):
http://www.cyberpowerpc.com/saved/1DVPVH
The cyberpower build (tell me if you can get it any cheaper):
http://www.cyberpowerpc.com/saved/1DVPVH