I would stay away, they have known issues with overheating....i bought a refurb on from circuitcity.com last feb and the video card only lasted 6 months before it crapped out and i had to replace it, it has nice specs but your better off buying new with warrenty, or at least a refurb one and immediatly doing a cooling mod on it...
I look at it like this: If I'm going to get a gaming laptop, I'm going to get something with a few years of use. If I'm not going to use it for gaming, and have an alternative system, then I'll get the cheapest thing I can find. Right now I have a dual core 2.2 Ghz laptop I got for $375. I use it for writing and web surfing, and I plan on using it for years.
Point is, spend about 1000 as a minimum for a gaming laptop, or buy a desktop.
I bought a G51VX-X3A about a year ago from Newegg. P8700 @ 2.53ghz, GTX 260, 4gb ram, 2 hard drive bays you can run in raid0 and 1920x1080 screen. I'm very happy with it and it has never overheated. I think I paid $1100 for it. I don't think it's a bad price. Lower $ is always better. I haven't been up to date on the new gaming laptops but mine was a lot of laptop for the money. I have 2 320gb WD Blacks in raid 0 and xp installed currently. If you want any benchmarks I can run them for you and answer any questions. I may upgrade to an ssd and terrabyte drive soon and a quad later.
For loops it will run say 4 and give you an average. I'll run it five time and use the benchmark_gpu timedemo and time of day 9 like most are using. It has to do with shadows and lighting. Be right back.