As for speakers, keep the Krell (tested at 2x190W 8ohms both channels driven and 324W into 4ohms) as I stated above, and get full range ESL’s (electrostatics) eg: ML cls/quad etc, or next best, full range ribbons eg: Maggies ect.
And add a/some S/H active sub/s from 100hz-150hz down (these are cheap. Far better than a full range single driver or multiple driver, and the ultimate in transparency and dynamics and your Krell will yawn at having to drive them.
Cheers George