A DA-07x recently replaced a Bricasti M1S2 in my system. The Luxman has a slightly different tonal balance which is a little more forward in the upper frequencies. The overall sonic quality is very similar. This difference is like the difference between the house sounds of Audio Research vs Soulution.
I tried a C900u, and it was more laid-back sounding compared to a AR LS28SE or Benchmark HPA-4, almost like Soulution.
I bought the Luxman DAC unheard, but it is looking like it is a keeper!