Magnepan MMG for low volume

There's no question that Maggies, including the MMG, come alive at moderate or high levels. Still, I agree with Onemug that there really isn't very much competition for the MMG at that price level. Particularly if you prefer acoustical music as you do. They really are amazing for the price, and with a few simple modifications, can be elevated to astounding for the price.

It's also worth noting that as someone just pointed out on another group you can play dipoles louder than other speakers without disturbing the neighbors, which kind of makes up for their reticence at low levels.

My suggestion would be that you take Magnepan up on their money-back offer -- if they don't work for you you can send them back.

In a VERY quiet space Maggies have plenty of detail at low levels. And I mean pin-drop quiet. So quiet that with the front door open, a cricket in the hedge outside is pretty loud.
Not as much bass, perhaps, as you'd like, but don't forget the ear gets less and less sensitive to bass as levels drop.