Just reiterating about Magnepans and low-volume listening.
I had the LRS (first edition) and switched to the 1.7i, they definitely sound better to me at lower volume levels, either with, or without a pair of REL T7/x subs in the mix. Low to medium volume for me.
Same room, same gear, driving CSS Criton 1TD-X stand-mounts and I find I want those babies cranked up. If I want to listen loud they are much better than the Maggies.
FWIW, the 1TD-X have more definition, clarity, "air" or whatever, they just sound better and I can more easily pick out the individual instruments/voices. Bass is much better defined w/wo the subs. Bass tone is definitely better. bells, triangles, cymbals sound more defined and natural. Singers are right there
The 1TD-X are less than 1/2 the cost of the Maggies and will fill a small/medium room with sound. They are as inefficient as the Maggies and need lots of juice to get them going. Just my 2 cents.