I agree and think a horn/folded horn speaker or single driver speaker might do the trick. I have Charney Audio Companions (with the AER BD3s) and also own A-S Class D amps. My system is very musical while still revealing details. No fatigue whatsoever on long listening sessions. I also pair these with SVS subs. I have not listened to the A-S Ds with Klipsch, but also previously owned Rethm speakers which had very similar attributes to the Charney's. These high efficiency speakers really show the magic of the AS mono amps.
The speakers you (AI) mention have a fairly dramatic price point difference. It may be helpful to know what your price point is. I don't know where you are located, but you are welcome to have a listen here (New Orleans) and Charney Audio is located in NJ and would definitely be worth a stop.

