Which of these 4 laptops is best please?

[DKS]

Sorry for the annoying question, but having been out of the PC world for a bit, I'm not too familiar with the new range of processors, and have found a few reviews about i3/5 dual cores being more efficient than even a quad core AMD!
I want dedicated graphics I think, for HL2 maps etc.
I think this one is the most powerful, due to the dual graphics, but maybe not!
http://www.currys.co.uk/gbuk/computing/laptops/lap...

Other choices are these:

http://www.amazon.co.uk/dp/B00H7911TQ/ref=wl_it_dp...

http://www.amazon.co.uk/dp/B00JB0D45I/ref=wl_it_dp...

http://www.amazon.co.uk/dp/B00IG55RWC/ref=wl_it_dp...

Any help or even just opinions gratefully received.

[DKS]

Thanks for the replies.
I understand for modern games its not much use, I have the Xbox for that. But I do play HL2 a bit as new maps are released weekly and my current 4 year old PB laptop plays that OK at medium detail, so just want to sort of lean towards a bit more poke.
I did worry the one with the better graphics had a slightly ropey processor.
So i3 or i5 is the way to go. Thanks!