Hi Hce4,
Friends of mine also have the Sophia 2's, and had a similar experience with their Gamut MKII amplifier. They are now using a Jadis Defy 7; which sounds very good. Their dealer, Brooks Berdan, had several possible choices for them, and they liked the Jadis best. The Jadis is a tube amp. I hope that is in your scope of options. From what I heard, as they evaluated the system, the Jadis really sounds the best.
Good luck,
Mark