I have a D-300 that I now use as a spare and it is always a pleasure when its in line. Although not really tube like; the D-300 conveys a good presence and "weight" to the music. I once had a Krell FPB 300 and to me the ARC was less fatiguing on the short haul. Somewhat soft at the extreme treble, but a wonderful mid and low mid. Runs cool, and never left the house for repairs. I replaced it with a VT 100 mk 3 for a true tube sound. And don't forget the D-400!
