Forget the old laptops like the G74SX and G75VW.
The Asus G752VL-DH71 is fine for playing games. Most "hardcore gamers" would consider the GTX 960m to be the minimum GPU people should shoot for when looking to play games on a laptop. The G752VL-DH71 has a GTX 965m and it is a lot more powerful than the GPUs in the older laptops.
However, since you are looking for a 17.3" laptop to play games I recommend the following Asus ROG Strix GL702VM-DB71 for $1,229 with a quad core i7-6700HQ and the GTX 1060 GPU. The GTX 1060 is basically slightly more powerful than a GTX 980m which means it is significantly more powerful than the GTX 965m.
https
/www.amazon.com/Asus-GL702VM-DB71-17-3-Inch-i7-6700HQ-7200RPM/dp/B01KB0W4R0/ref=sr_1_6?s=pc&ie=UTF8&qid=1481906358&sr=1-6&keywords=gtx+1060+laptop