Fazer, welcome to the ASUS:RoG community. I have the G73 myself. I have enjoyed it for over a year, and decidedly couldn't wait for the sandy bridge, for 6-10 months, to get my game on.
I have only had 1 issue with the laptop at all, and it was in playing D3. So i went to walmart after reading massive walls of text, on various forums. The magic words? Compressed Oxygen. Make sure you unscrew the 2-3 screws that hold on the bottom panel, and spray it through the back vents and the underside. My computer would overheat, but now, it works perfectly.
I have played a large amount of games on the system and didn't have a problem until the dust settled in my system. To include: TF2, Portal, MW2, Mafia 2, WoW on High/Ultra settings, SWTOR, League of Legends etc etc.
If anyone in the community would like to join me, I'm playing a Demon Hunter, and a Monk. Hit me up. Character name Thyrd on LoL. Or send me a message for my email for my RealID
-Thyrd