Putting out feelers to see what laptops people might potentially have to swap for my almost brand new iPhone 8 Plus 256gb in Space Grey.

I bought the iPhone 8 Plus as an interim till my iPhone X turned up - which arrived far earlier than I expected it to. 

Laptop wants; I have a Surface Pro 4 currently, but finding it's not up to the task of editing photos and video (mainly GoPro and Drone footage). So after a pretty recent i7 with minimum 8gb RAM (ideally 16gb), 256gb SSD minimum but ideally 500gb+, and ideally a dedicated graphics card. consider anything between 12" and 15" that is still relatively portable. Would love at least one USB-C port along with 1 or more USB-3 ports. 

I'm in Auckland so ideally would like to meet in person to do the swap but open to all reasonable offers. 

Or make me an offer on buying the phone outright.

Still have the original box and all accessories, never been dropped and no marks at all.