i have three main options for bindings 

lol @ bombing black diamonds.

I ride force and pretty much only ride park. They have a pretty good flex. Not the softest or stiffest on the market. They are pretty solid bindings. I have no knowledge of the other two bindings though.

Union Force have been my go-to all-mountain slayers.  Maybe more of a park-flex than the usual all-mountain-adept bindings.  Very versatile, comfy and durable.  

one more to add ride beta mvmnt

I would think about the Union contacts instead of the Forces. The Forces are more all-mountain bindings. I rode Contacts for a year and all i ride is park and they were amazing. 

wont fit im 11

Unions. Havent seen the new line yet, but i trust they look cool.

If you do park only, with union go for the contacts indeed.

Burton, no point in taking the triads for park really, the cheapest ones are as good (less comfy though )

Ride, delta are good for park only, or beta but they are quite responsive for park only use.

Maybe even add Ride's "Contraband" to your list, they have 3 different series now this year, making some small extra changes from "first year debut ideas". Plus they come with the new "wedgie" footbeds that makes better ankle to leg alignment for those who rock wider stances. Also adds extra ollie pop and the perfect combo for rocker boards. Check out Ride's site, they have tech vids on every single one of them. Im glad i waited till the 2nd season from their debut, just from the looks of the changes and more options they made. Im sold on them, ordered the "Nitrane's" a week ago. Good Luck.