Just for the record, speaker amp technology is not as big a deal as the old days. Part of the reason is BOSE developed the subwoofer and active crossover amp designs to a fine degree so that now the primary speakers can handle the mids and highs and not have to deal with bass frequency voice coil/cone destruction a full range speaker usually faces should be a thing of the past, and is standard fare on 5.1 type multi-channel stereo systems... yeah I know what your think'in my fairing only has two speakers, why bring up 5.1? Because this is how home stereos can sound so good yet only have need 50-75W per channel amps?...because they use efficient drivers for the mids and highs with active electronic crossover amps operating in their optimum frequency/amplifier sweet spots.
It is too much to expect a single small diameter speaker driver to produce bone crushing bass and shrill mids and screaming highs thru a 3 or 4" speaker driver without compromises. Add to it the rain and sun environment, the one with the more rugged design wins. If there was a way to move the bass to a subwoofer in the fairing (bass is not directional anyway), you could crank up the volume for the mids and highs, the sonic quality would be vastly improved without distortion or damage to your left and right speakers. Do either the Hog Tunes or J&M speaker amp systems offer this technical active crossover design, that would probably be the real decision maker, as most modern stereos use this set up to get great sound out of small drivers and low power mid & high freq amps...leaving the high power amp to the subwoofer. Not having experience with either one, I would say the one to best use modern technology wins...JMO