I have paired a 250 Pro with as-new rebuilt Quad ESL-63. Power limited to 130w into 6 ohm. Awaiting lower inductance cables, but with £50 copper cables is sounding sublime. They are now on stands.
250 Pro CI; Innuos Zen Mk3; Claro dual turntable (Expert Stylus Denon + OL Aladdin Mk2); RCM Sensor2; Wilson Sabrina; OePhi speaker cables; Puritan PM156 conditioner and Ultimate cables.