Do you have an opportunity to strap into a pair in a local shop? These bindings can be set up to really clamp down and be ultra supportive. It is a pretty unique featur of the design. I would highly suggest that you do that if you can.
I did today. I brought my boot, and it fits similar to my old binding. Some overhang. They didn't have the GT or RS but did have the AT. So now I'm not sure if I will go with the GT's S shape strap, or RS's conventional over the top one.
what do you suggest. I recon the RS is even stiffer than the GT, and will probably cover better my larger boot, that the toe strap of the GT which might have difficulty reaching around.