Alienware makes some sick machines - although they tend to be overpriced.
An 11" machine seems WAY too small for gaming too.
Another possible issue could be heat, but just about every laptop that has any balls is plagued with that.
Alienware does offer some very nice financing options if you qualify for enough credit through them.
I myself run a Dell Studio XPS 16 - the 16" screen is just the right size, it's handled most games I've thrown at it at decent settings. It gets SUPER hot, I have a zalman cooler that you HAVE to use if you dont want stuff to start melting lol.
You can probably pick up the older Core 2 Duo(what mine is) series at an outlet store for a good price, as they've upgraded the Studio XPSs to the intel i series processors.
I also LOVE the backlit keyboard, that was a huge selling point for me, and a lot of laptops do not offer that feature.