What's wrong with Fritschis? Climb with a free heel, then lock and ski alpine style. In terms of a bomber binding with downhill performance comparable to that of alpine bindings, Fritschis and Naxos are your best bet. The Fritschi Freeride is plenty bomber for most, the Naxo nx21 is arguably more bomber than the Fritschi Freeride, and it's distributed in the US by Backcountry Access bcaccess.com
Otherwise, your options are Dynafit and Silvretta, both of which are substantially lighter than the Freeride or nx21 but still surprisingly heavy duty¬ójust don't huck anything huge.
Have fun and be safe!