I have not compared the rDAC to other DACs but have compared it to CD players:
IN US dollars: $1900 Vincent, $1200 Arcam
test 1: play the CD player as is, using it's internal DAC
test 2: hook the CD player to the rDAC via co axial input and then rDAC rca output to preamp
The rDAC was equal to the CD players, with slightly better bass, and slightly less harmonic richness vs. the treble capabilites of the Vincent
my system:
Oppo83 blu ray player>>>rDAC>>>Jolida801a>>>Martin Logan ESLs
I have also have several other speakers, an NAD C512BEE, a Parasound P3 preamp (not recommended)
and a 300 W 12" servo sub woofer, the Parasound has been relegated to controlling the subwoofer only
because it is not good for mids and highs.