Just curious why you'd want to get the Asus G51? Isn't that an older version now?
If I wanted to get a 15" Asus laptop (good for gaming) then I would go for a G53 one like this:
http://www.btotech.com/product.asp?pf_id=asus_g53sw-a1
It has one of the newer Intel i7 Sandy Bridge cpu's and a 1.5gb GTX 460m gpu.
I was actually considering getting one of them (when they still had the older i7 cpu's).
Instead, I got a very portable w/long battery life MacBook Air. I'm loving it in the 3 months or so that I've had it. It's very easy for me to take it around as well being very thin/light. I do most of gaming at home, so I just built myself a really nice/powerful desktop ( http://gamrconnect.vgchartz.com/post.php?id=4012535 ) ;-p
starcraft: "I and every PS3 fanboy alive are waiting for Versus more than FFXIII.
Me since the games were revealed, the fanboys since E3." 
Skeeuk: "playstation 3 is the ultimate in gaming acceleration"
