Take at look at 3 flashes the yongnuo 565 568 and
Shanny sn600n. 1.8 second recyle and 1/3 stop less than yhe sb910. And i couldnt agree more regarding buying nikon flashes. Ive sold 2-sb800 my sb700 and sb800. See my post below yours. Atm im done buying nikon flashes. The 3rd party ones are that good today that any pro would have no issues and wouldnt compromise at all