I have the same laptop, but one or two generations older -- the G73. I've had it for about 2 and a half years. Has half the RAM, and a mobile HD 5870. Still going strong and can play new games (with low settings). I like that it has two HD bays. Mine only had a single 7200RPM HDD, so I used the other bay to add an SSD. You ought to consider doing that. That fricker will scream.
I'm probably going to get a new laptop in the coming months, so let me know how that one performs. My G73 is good but not without its faults. I love ASUS, and there is absolutely no other laptop at that price with those specs, so they always win best bang for buck... but I kind of felt like a beta tester. There were issues with trackpad interference, poor wifi signal, and poor graphics card cooling. I fixed all of those issues myself, but I had to disassemble the entire thing. The card still runs a little hot, but that can be blamed on design.
Specifically, I'd like to know how hot the GPU gets. Download GPU-Z or HWMonitor, run it, and play a game for an hour or so, then report back the max temp.
This post was edited on 2/10 at 2:18 pm