I heard about the Wadia 151PowerDAC from my friends at Magnepan, who make some of my favorite flat-panel speakers. They loved the way the 151 brought their fourteen-inch tall Mini Maggie speakers to ...
My friend who also has the 1.6s uses a Bryston amp to drive them. It works quite well, and all Bryston amps have a 20 year warranty, which is hard to beat.