D'Agostino Progression pre-amp vs Audio Research Ref6SE

Thanks gregm. Very interesting.
I use my current pre-amp with Krell Mono 400e, which is a very enjoyable combination.
My goal is to go eventually also with the Progression power amp.

As it happens, I did, recently. Empirically, I preferred the Progressionon all counts -- transients & dynamics, details, sense of phase correctness...
They drove a 10kHz input impedance power amp and we played classical music, orchestral & opera.

Not knowing your amp, I can't tell if you'll have similar results --or not. Regards