Make sure you get a laptop that you can change or upgrade your GPU.
Most of the laptops out there you will not be able to upgrade or even change it out. Just a 580m card is around $400.00 to $600.00 depending where you get it and those are the 1 GB of Vram.
I know the Alien wear laptops you can upgrade or chang out. This is just food for thought. Good luck to you.