Replying to Which Dynafit?

Okay, so I'm looking to get some tech bindings.
The trend of everything seems to be going towards bigger/burlier, which has me wondering what I really need.

Me:
6' 175lbs ish
Ski fairly fast/aggressively, but tend to stay mostly on the ground. More popping little trannies and slashing around.
These will be pretty much exclusively for touring I have a setup with big skis and dukes for inbounds stuff.
Have my dukes around 10-11 DIN

I'm looking primarily at DYnafit as they have the best used market (Realistically I'm not going to buy new bindings)
Pretty much wonder if I should go FT or can I probably get away with the ST?
Is anyone selling any?