Laptops for gaming: Which will work better?

I live in Canada, and I am in the market for a laptop for gaming(Not a gaming laptop... just a laptop which will run modern games at somewhat suitable speeds), and I am wondering which of these options would work.

There are three laptops. I know All the laptops have 8GB of ram.

First is the AMD Quad-Core A8-4500M Acelerated Processor, as well as AMD Radeon HD 7640G+7670M 1GB Dedicated Graphics included(Quoted directl from the Future Shop flyer next to me).

The second comes with the AMD Quad-Core A10 APU, as well as ATI HD 7670M Discrete Class graphics and 1 GB of built in graphics memory(Slightly out of my price range)

The third has the AMD Quad-Core A10 APU and the AMD Radeon HD 7660G discrete class graphics.

So I ask, which of these would best run most modern games at a satisfying FPS at mid-to-low quality(Examples of games: Borderlands 2, Skyrim, Portal 2).