Lalit,
I cannot disclose the DAC I will get because it will end up being somebody's prototype. But the DAC I have been using is an out of production modified Douk. There might have been others better, but not in my system.
String... nice feature. My Herron amps don't draw much when just sitting in the man-cave at idle. i just walk down stairs and turn on the preamp, phono stage and start the turntable spinning an hour or so before I go down to do any serious listening.