I have both a SB3 to DAC to PreAmp based system. And also a Computer/iTunes/Pure Vinyl to Pro Audio 192/24 interface to PreAmp. For convenience the SB3 can't be beat, for sound quality the iTunes/ProAudio set up sounds better for the same money and also acts as a MC Phono Pre for digitizing & listening to Vinyl.
I end up using both depending on what I want to do at the time.
Jim C