I was looking at the Flow and K2 Cinch and depending on the shop you get mixed reviews about both.
Never tried them on a board so I have no clue how they feel.
I would go for the K2's, I like that the whole front of the binding lifts when you open the back.
Let me know if you have any good or bad experiences with both brands.
Flow

or

K2 Cinch

or
Wipika 4m, Pansh Ace 7m, Beamer II 3.6m,MBS Element, Doomwheels