I3 - 4100M
will max almost anything at 720p
push it to £545 and you get an I5 4200M
If I choose not to include an OS on that website, I get a lot more leg room.
For £498, I can get:
i5-4210M (#78), 8GB RAM and the GT 850M (#36) (which is the same price as the GT 840M for some reason).
well most people don't have a spare OS to hand so I include that in the price - but yeah I5 4210M is enough for gaming.
Don't complain that there's no price difference... Just get it quickly before they realise. But this sort of config is £700 + on retail So yeah enjoy