I have the AR5 176 ( the first ones that came out). I mounted them with Power 120s ( pretty much the same as your bindings). They are really light, and have a not too bad rentention. I would put the din way up there though with these. If you put it at the sugested weight you well pre-realese on everything.
Jer: I would slam my cock in a car door to ride right now......fucking summer.