The Wolf Von Langa SON or STAGE II are great options although hard to find used. They both are just under 40" tall. I have the SON and it is an incredible speaker with field coil driver. It is over your price point new and probably used. The STAGE II is going to be less, but I'm not sure if it is under $10k. THe interesting about the STAGE II is that it can be upgraded to the SON if you would like in the future. Footprint is compact too at 16w x 12d.
High-end loudspeakers in field-coil drive technology (wolfvonlanga.de)