Any of the Luxman would be suitable as there is a Loudness feature which is provided for low level listening. When the loudness feature is enabled, the bass and treble will be boosted and this really helps with low volume listening.
Having said that, I rarely use the loudness feature as I usually listen at around 50 to 60dB at low volume levels, 70dB normal levels. At very low volumes of say 30 to 40dB the loudness feature will then be useful.