DomQZW :
The title says it all. I'll be using it for video editing.
This as been asked a lot of times, and i still dont believe that the 2133 (pricey) ram is much faster than 1600, especially when you only get half the RAM.
I may not be the best person to advice, since i have not done my homework on 2133 ram, but if it were me i would go with 16gb.
Having 2x8gb and doing a ton of editing and modeling, i know how usefull it is.