Don't know much about the Hafler, but be carefukl with very old amplifiers. Capacitors can leak and fail over time. What's your budget?
FWIW, I am running my McIntosh C220 preamp into an Odyssey Audio Stratos HT3 (with cap upgrade) with excellent results.
FWIW, I am running my McIntosh C220 preamp into an Odyssey Audio Stratos HT3 (with cap upgrade) with excellent results.