Welcome from upstate NY. What did you like and not like about the HCX 165? Of the speakers you mentioned they are easily the strongest. They should have sounded much better than the RF or DS18, was that the case to your ears? What amp are you pushing them with?
Like you said about preference, there is no best speaker just like there's no best oil, seat, bars or cams. Certain stuff sounds good with certain other stuff to some people and not so hot to others. You started down a path with the horns, what drove that?
Freedom isn't free, remember to thank a vet.
2018 CVO RG lava orange, 117 Stage 3, 14" F47 and a few chrome extras. Boom crap gone.
2016 RG Special Cosmic Blue, 120ST with Dragos 2:1 and TTS tuner, FBI drop seat kit and JNR air ride. Stock audio long gone.