In the first place, what kind of gaming will you be doing?
I have never used or seen a Digital Storm laptop, so i can't put persuasion on them. MSI has the GE Apaches (5 lbs, low end laptops) GS Stealths (like 5 lbs, very slim, and great gaming) and GT Dominators (7 lbs, powerhouse laptops) that are good and can come with the nvidia 800 series graphic cards. Asus mostly makes 17.3 inch laptops that can be builky at first if not used to, but are a great company.
I can give specific recommendations once I know what kind of gaming?