I'd enjoy having my Acoustat Model 2's back again, provided I had a dedicated listening room for them. They had an incredibly small "sweet spot", no deep bass, and were inefficient as hell, but for a solo listener with the right amp, they could be terrific.
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?