i got reply from Vitus owner
advice me to buy RD-100
DAC with Pre
he think it will sound better then SL-101 Pre with my DAC
I have heard that. I wouldn't, it is nowhere as good as sounding as Vitus top of the range amps and won't make a difference. My friend had this with Vitus class AB integrated, and he sold it because his Metronome C2a, which is an old used Metronome sounded much better. Now he has the Dartzeel integrated. To enjoy Vitus you need to get their class A amps - that is where the Vitus magic is. I do not know anything about their higher end CD players.