Replying to New MacBook Pro for video editing

Hey. So I have been waiting for the new macbook pro for a while now as I really need a new laptop. Now that the new 2016 models are finally available for pre orders I need some help deciding which one to go for.

I'm in my first year studying tv-technic with my main focus being on documentary style filming so I will mostly use it for video and photo editing from all kinds of different cameras and projects. Therefor I want to make sure whatever I get now will be able to handle heavier projects down the line as I'm not sure what kind of stuff I will end up working on.

I'm pretty set on going for one of the 15 inch models but I'm not sure what specs I need. Currently I'm thinking the 2.6GHz i7 processor, 256GB SSD and the Radeon Pro 450 2GB graphic card. Mostly wondering about the graphic card, would there be any point in upgrading to the Pro 460 with 4GB memory for video work? On what kind of tasks would one generally notice an upgrade on the graphic card?

Thanks in advanced.