Wait for haswell, then make sure it has a descrete gpu with as many core/shaders as you can get in the thing for 2400, even then a 1k desktop would be 3x the performance Games require huge gpu power, that power creates a lot of heat, somthing that a laptop cant escape from unfortunatly
This is pretty good. Has NVIDIA® GeForce® GTX 660M with 2GB GDDR5 VRAM. Looks very nice too. You might be able to get a better deal, but this has a nice look to it also . Tell me if you need something with more power.