I have listened extensively to CDSD/DCC2 combo. IMO the DCC2 lacks body compared to the latest dCS Elgar Plus / Verdi La Scala combo, and using the inbuild preamp only makes things worse. I greately prefered a Nagra PL-L tube preamp to DCC2 preamp.
I would go with a HQ preamp by all means.
I would go with a HQ preamp by all means.