I will be purchasing a MBPR with 16 gb of ram. As much as I want to upgrade both the processor and flash storage, I can't do it. What do you guys think is more important to do? Upgrade the processor from 2.6ghz to 2.7ghz, or upgrade the flash storage from 512 gb to 768 gb? I will be purchasing an external with 1 or 2 tb on it. So I'm thinking just upgrade the processor. Or is internal storage just as important to keep this laptop running well, while editing hd footage?