Well if you want lighter bindings I'd suggest salomon 912ti's. Definately a good choice. I have rossi's on mine now but they're a tad heavy, so I'm putting my Salomons on before the snow flies.
agree with cko go 912 ti if you want light but the truth is you really cant feel the weight when your skiing and barely if any in the air and the look rossi bindings are better.