I second Ron here. Even later;)
I just bought them and they are marvelous. I wonder why these aren't more attended to at Agon. These are growing on me more so than i believed. The chassis construction and finish of details are incredible. If you like ribbons, but with a total seamless integration of all drivers, coupled with authority and superb musciality. These are for you.
IMO, it sometimes appeals with ribbons and i have honestly not heard it this good before.
So very musical and highly resoluted.
To me these are very special. I used Wilson Benesch ACT years ago, PMC IB-2 and MB-2 (home demo). PMC is very good. But looking and listening at these. Suggest a feeling and sense of a very genuine quality.
Even so, that you can get them to sound very very good with W4S STI (not expensive).
It is not an expensive combo if looking to what you'll get in terms ear-candy;)
So, i use Wyred 4 Sound STI-1000 and currently, Lyngdorf CD-1.
Audio Art SE biwire and Signalcable Silver Ref.
What amazes me is also the organic sense the W4S amp have with these. Oh, .. i love it. These are keepers for me.