If you can live with the boxes, you can sometimes find all three SOtM Ultra units (including the switching PS, which is pretty good) being sold at a good price. They did sound good but in a full-bodied sort of way with maybe a smidgen less resolution than from the Ambre. Both were grainless and musical. It was really a pretty close comparison with the Ambre, and I owned both units at the same time. The Ambre was just a little more dynamic and hard-hitting and the SOtM a touch richer sounding. However, they were so close I chose to keep the Ambre because it is only one box and because it dropped Roon less often (from seldom for the SOtM unit to pretty much never for the Ambre) and was easier to restart after powering down. The GAIA looks like a nice unit.
BTW, how did your friend modify the Ambre and in what ways did the modification make the Ambre sound better, if you can share?
BTW, how did your friend modify the Ambre and in what ways did the modification make the Ambre sound better, if you can share?