The Alienware is a great option for a gaming laptop. It has excellent graphics and sound. Another option for you is the Asus G51JX-A1. It has 6 GB of RAM, an Intel Core i7-720QM processor, a 15.6" screen, and it weighs just over 7 lbs. It is very portable for a power gaming laptop.
What do you think of the Asus?
MSFT Windows Outreach Team