There is active discussion about the radio changes and models for OPP and EMS going on in the "700MHz Vehicle Repeater Discussion" thread as they are heavily into the process of replacing them all.
One user noted EMS had APX 6000 radios, and the OPP possibly using dual band APX 7000. In another thread, an APX radio was seen installed alongside the MCS2000's in a Waterloo EMS vehicle.