I am jumping in as I currently have a M-Scaler, a Dave and a TT2. And I used to have the dCS Vivaldi stack ( but the transport unfortunately which is sensational).
Don't get me wrong, I did not switch from dCS to Chord because the sound quality was better but because 1) in my far from perfect room,I could not get the best out of it 2) too much space and too many expensive cables involved 3) wanted to have extra budget for other hifi gears...
Now I am very pleased with the Chord choice. The only other brand which is tempting me is Totaldac (Direct model. Twelve MK2 is probably fantastic but back to the multiple big box story...)
As a pure DAC, Dave is better than TT2, no contest. Now with the Mscaler in the loop I found the improvement brought to the TT2 quite significant and more significant than to the Dave. Adding to the facts that the headphone amp section of TT2(if you are in headphones as well) is more powerful and versatile, and that the combo is "transportable" I am actually more and more inclined to keep the TT2 instead of the Dave (again with the Mscaler in the loop).
PS : and the SGM extreme is on the top of my buying list but same interrogation : 1) life expectancy. At the same time it's so much better than any other servers I ve heard...2) won't be fully exploited in my room and with the "modest " Chord stack...
Alex