As to what you’ll like or what sounds better, those are questions only you can answer. Do you prefer a more detailed (some call it clinical) sound or a smoother (some call it warmer) sound? I suggest listening to multiple DACs as there are variations among delta-sigma and R2R DACs and within those two categories.
As to LUMIN, I auditioned both the D2 and T2 at a dealer. The T2 to me was audibly more resolving and clearer. I took the T2 home to audition, but since the T2 will also work as a streamer, I compared the T2 DAC output to my current DAC, an Ayre Acoustics QB-9DSD. I found the Ayre DAC more neutral, equally if not more resolving, but less clinical sounding (said another way, it had less of what I perceived to be an edginess in the higher frequencies). The result was I purchased the LUMIN U1 mini, with which I am very pleased, and upgraded my DAC to a QB-9 Twenty when Ayre came out with that major upgrade.
LUMIN makes an excellent product, and using an Ethernet connection from my music server to an Ethernet switch, through the LUMIN via Ethernet, then to my USB DAC was far superior to connecting the server to the DAC directly via USB. I use Roon, but find LUMIN’s app a reasonable alternative providing fewer features but less complexity. And their app sounds as good as Roon if not a slight bit better in clarity.
I can’t speak to other products, but encourage you to audition several, preferably at home with your other gear. My dealer’s showroom has extensive acoustical treatments which made their listening rooms sound almost dead to me. Very unnatural, not like a room in your house or a concert venue or club, more like a recording studio.
Happy listening.
