Your options are the Dometic Penguin (low profile unit) in either heat pump (I suggest because they automatically equalize each time power is removed, so no restarting lag time or tripping breakers) or straight AC, and either the 13.5 kBTU or 15 K btu. If noise is an issue for you, consider the 13.5K model...low fan is actually LOW speed windings on the motor. The motor is 3-speed, but for the heat pumps, dometic uses only two speeds. on 13.5 the are LOW and HIGH, and on the 15k, the option says LOW, but is actually the medium speed windings, to ensure enough transfer air across the condenser coils (since both fans share the same motor).

RVProducts (Coleman reincarnated lol) also has a unit now that resembles the low profile AirV model by Carrier, with a separate, horizontally-mounted axial condenser fan like the Carrier unit. I have not worked with any of them yet, however, so have no technical information to add about them. Sorry.