This has been covered many times before. Using what equates to little more than a loudness button is antiquated thinking. Ultra-sensitive loudspeakers, often horn-loaded, are more dynamic. Dynamic range at all volume levels, including at low levels, is higher. The human brain perceives increased dynamic range as more satisfying at low listening levels. You yourself already wrote;
I previously had Klipsch Cornwalls and found them very enjoyable for low level listening
So, I have to ask, haven't you already answered your own question?