TriggerFinger

IMHO except for RAM and hard drives, there's not much room for upgrades (i.e. CPU or graphics card...) in laptops. If ever there are available upgrades (chances are close to zero), they would cost like gold.

As for the CPU replacement, yes it is possible but IMO would not have significant performance improvements in games.

My advise is get a high end entertainment or gaming laptop (ask your computer dealer or read some reviews in the internet).