I've used Union Forces as well as Union Asadachis on my old Banana, and it still allows for good, natural flex.  I think I've read of Ride bindings not allowing for as much proper flex, but I could be wrong.  (Or I could be right if Ride still makes aluminum frame bindings, but I haven't bothered picking up a Ride binding in years.)  

Union forces???

i ride 80%(mt.) and 20%(park).........should i go with......force SL ???

You could.  I've never tried them though.  The Data are solid.  Just like the Force, just a hair stiffer with more shock absoprtion and cushion.  I ride the same percentages as you - if not less park, and the Force and Data are my go to bindings.  

alright!!! i'm going with...force(green)555!! thanks for you help...my friend!!!

Enjoy those.  You'll be stoked!

I'm assuming you haven't gotten those yet since the green Force are coming out next season.  I forgot to mention the Contacts.  They retail for $20 cheaper than the Force, and they're super lightweight, and they're pitching next year's as built to work with reverse camber boards.  There's a brief video on Youtube, and I'm stealing and posting a write-up from elsewhere below:
[Edited by 66jzmstr on 5/25/2009 at 8:27 AM]