I have heard the Lumin T1 (not the X1), it was very good, musical and engaging. Heard the Dcs Bartok and the Vivaldi Stack multiple times in different systems, was never impressed nor engaged with them. If you can, look into MSB, which I'd take over both.
Lumin X1 or dCS Bartok
Both of these beasts look like they could be that “forever purchase”. These are basically the newest offerings from both well respected companies and are within spitting distance of each other price wise (without the Bartok headphone option installed). Anybody heard both and able to comment?