Is the ad-20 any better of a a/d than what the d100 uses? Anybody have any thoughts on the mp-2 & ad-20 combo?
The ADC-20 is
different than the D100 ADC. Many folks would say better. Depends on what sound you're after, really.
ADC-20 - very detailed, good instrument separation, crisp and (to my ears) digital-sounding.
D100 ADC - okay detail, not as much instrument separation, softer/smoother more analog sounding.
Great tapes have been made with both! I know, this doesn't help your decision-making process, but...it's the truth.