i'm not sure which bindings have the canting feature but i love my rome 390s. they have the "auto strap" feature which i don't care about but some like it. it just keeps the strap out of the foot bed. they're a little on the heavy side but i'm fine with that. the straps have gel and super comfortable.
i hear nothing but great things about union but i've never tried. look into the contacts or stiffer force