graphics card for running linux games on laptop

[mixpro]

hi,
im planning on buying new laptop , which graphics card do u recommend for :
1 - running ubuntu linux
2 - running games on linux (specially dota 2 , and new games).
3 - not much expensive

thnx

[mixpro]

to narrow it down , most of the laptops i saw had a NVIDIA GeForce GT750M , how is that as a graphics card ?