If I was looking to buy a new laptop that could be used for some lite gaming, I would make sure it did not have 1. dual graphics / switchable graphics. They are problematic at the least. CPU is also important. Here is a list of CPU's and GPU's benchmarks. It will give you a rough idea of how they compare.
GPU > http://www.videocardbenchmark.net/
CPU > http://www.cpubenchmark.net/
Intel I7 960 @ 3.87ghz *Intel DX58SO *HIS HD6970 2gb *Corsair TX650M *2x4gb Corsair XMS3 *WD Black 1TB *Windows 7 Home Premium 64bit *Gateway HD2401 24" 2ms 1920x1200 ***Asus N71Jq laptop *Intel I7 720QM Processor *Mobility Radeon HD5730 1gb *8gb Ram *Windows 7 64bit ***Acer 5750 laptop
* A clear conscience is usually a sign of bad memory *