Nice laptop - although I'm not really a fan of Asus lappies
I have a Dell XPS 1730 with dual 8800's sitting collecting dust - I got it back in the days when I thought I would go gaming on a laptop.http://www.notebookreview.com/default.asp?newsID=4225
It's still a nice laptop but I only fire it up once every 6 months or when-ever I remember about it - lol. It's a beast in terms of size - classified more as a desktop replacement than a laptop.
While it was and still is great in the graphics department (sli 8800m gtx's - they are between 5 - 12% slower than the gtx 460m in that Asus your looking at - not bad for a 3 year old laptop!) the disk drive in it was rather slow - a 5400 rpm drive - it lets the laptop down. Mind you, it's got two hdd slots so I guess one could put in 2 SSD's and it would fly. The cpu is dual core which was good in it's day but that Asus is a quad core so the cpu grunt in my 1730 wouldn't even get a look in.
I also have an HP i7 laptop packed out with 16 gb of ram :-) Departing cheap purchase when I got the arse from HP. It's nice but I don't notice that much of a difference in every day use compared to my 1730 but under load obviously my HP just keeps powering on. The i7's are nice but I can't say I have noticed a huge difference.
Over all I found gaming on a laptop disappointing. The keyboard is just not acceptable for gaming so you got to plug in another one. Some of the screen panels are slowish compared to a lot of the desktop panels so if one wants reduced screen lag then you have to make sure the laptop has a good panel or plug in an external monitor etc
Maybe for most games the newer highend laptops are good - most games now are gpu limited and not cpu limited and the gpu's in laptops are the m series (nvidia) so they have less shaders, pipelines etc - you really got to check out the reviews and preferably reviews with the specific game or at least game engine that you wanna play. Some rigs play one game good and another game crap for instance.
oh yeah - these gaming laptops really pump out the heat so some say one of those laptop cooling stands are a good idea.
Check out the following link - they have reviews of laptops and what games you can generally play on themhttp://www.notebookcheck.net/Computer-G ... 849.0.html