I'd recommend the first one, or maybe the last one. The GPU on the second is pretty weak (Edit: Looking things over, it seems the 630M is pretty comparable to the 4670M, but I'd still say go for the first or last, 4GB of memory is going to be far more of a bottleneck than the 1 vs 2 GB of VRAM at the resolutions you'll be playing at). The first has less memory, but that's pretty easy to upgrade, and shouldn't be a problem in the short term, anyway. Overall, I'd say go for the i7.
How is I7 compared to A10 CPU's, is I7 better??
i7s and Intel chips in general tend to have better performance than AMD chips even at lower clock rates, currently. Whether that is due to them actually being worse chips or that software is just not designed to take advantage of AMD architecture, the fact remains that I have never seen a game that did not perform somewhat better on Intel chips. Then again, the new A10 Piledriver chips are supposed to be doing better than the previous Bulldozer chips. Plus they have the dual (Crossfired) graphics with the integrated GPU which will give a bit of a boost there. Whichever one you choose, I'm sure you'll be happy with it for some time.
And how is 630M compared to HD 7670M??
As I understand HD 7670M is still better even when 603M has 2 Gb of vram.
They seem to be pretty comparable, going back and forth on all the benchmarks I could find. Also, it's not so much that it's still better as that 2GB of VRAM is going to do nothing for you at the resolution the laptop runs at with those graphics. The extra GB is superfluous. Unless you are plugging it into a higher resolution monitor, it's pointless to get 2GB.
Is it better then the ones I suggested??
This seems to have a weak GPU.
Well, this seems to be American only prices, from what I see. But the 555M that comes with these systems isn't bad.
Stay away from video cards that have Optimus. I have a Nvidia Geforce GT540M 2GB with Optimus in my laptop and it causes a lot of strange problems.
Try to get one that has a single discrete video card.
You mean like the third one I suggested, where there's 2 GPU's??
No, since Optimus is an nVidia. I'm not sure how well AMD works in this case, but you can actually Crossfire the integrated and discrete graphics, which would make them more powerful than either card for certain games, though Witcher 2 seems to have some trouble with it, so it probably wouldn't offer any improvement there...