I also have that G72 from BB, just picked it up actually after debating over this question for quite some time. It is an outstanding machine, I love it (and I've had numerous high powered desktops). The only issue I've had is an odd one where steam and the creative software don't get along and cause the computer to lock up. Some have experienced this, some haven't. Simply uninstalling that creative software fixes the issue and you don't lose anything at all.
It DOES come with a lot of Bloatware from ASUS, but reinstalling off the provided cd puts a nice clean w7 copy on
You can also check out the G60 from Best Buy for $100 less.. but it has a smaller screen, smaller hdd(but 7200rpms vs 5400... you won't really notice it at all though), and 2gb less ram. For $100, I felt it was worth the ram, screen, and extra hdd capacity.
The ASUS laptops also OC very well with the included software. These G72's are hitting mid to high 11,000 3dmark06 scores, where as the new G73 (i7, 5870m, 8gb ram) score in the mid 12,000 3dm06.
They are a great buy, and the only thing in the price range that competes. I play MW2 with everything cranked at 1920x1200 (external 28" screen) and it runs absolutely perfect.
Good luck!