I had the opportunity to hear this combination a couple of years ago on a HiFi fair in London. It was very limited experience, so please take it as very superficial opinion.
I didn't like it very much. The sound was very dry and it wasn't particulary exciting.
During the years I had the opportunity to here various Avalon speakers with various amps and the best combination was Avalon Sentinel with Hovland Stratos monos - that was a great sound ...