None. I don't want any of them back. Had Eosone RFS-600s, then Wharfedale Emerald 97s, then Acoustat Model 3s. I like what I have now much better.
Speakers you regret selling
I was lucky to own Sonus Faber Extrema, Acoustic Energy AE1 Signature, and Dynaudio Confidence 5 in the past. They are rare in used market and can make any owner happy for the rest of his/her life. So I swore to myself I would never sell my Sonus Faber Amati this time though my wife has heard that a million times. What did you regret selling?