They are both great speakers. The 20.1's need a lot of room to breath - I had them in a 14x19 room (11' high) and that was too small. Also, they need quite a bit of amplification. If you buy them, I would consider the Sanders amp, as well as others (Classe Omega, VTL, Pass). Personally, for listening pleasure, I would like prefer the Sanders, as a more exciting speaker. However - when I listened to them last (3 years ago) they had a fairly narrow sweet spot, so I don't think they are the best for group listening. That may have changed by now, but it's definitely something to consider.
Let us know your impressions after you do your listening.
Peter
Let us know your impressions after you do your listening.
Peter