I agree that it is time for a new pc, with those specs. :)
I would probably buy something like this pc, if it was for my self.
http://www.pcworld.co.uk/gbuk/lenovo-g570-15-6-laptop-black-10747085-pdt.html
What I think is important, is that you find a decent brand, and look for the processor model used.
Intel core i3 and i5 second generation series (like i3-"4 digit"M f.ex.), is currently my best advise. You get both low power, and good performance in that packet, and the embedded graphics is performing well enough for most purposes, as far as I have seen so far.
But you might want to ask a hardcore gamer for advise on the new intel-gpu, if you need to play gpu-intensive games. ;)
Edit:
I forgot to mention that intel 2nd. gen. core i# cpu's, have much better embedded GPU's than previous generations, so it is important to select one of those. Otherwise you might get disappointed.