Assuming the $40K - $50K is your assumed new speaker price, I went through a similar exercise a year or so back. Also, we have about the same size rooms. My top contenders in no particular order were:
- Vandersteen 7 Mk II
- Vivid Audio Giya G2 S2
- Evolution Acoustics MM3
- Wilson Audio Alexia Mk II
- Magico S3 Mk II
After hearing all above I purchased the Giyas which, to my ears were the most cohesive (blending of drivers), effortless at any level, accurate (not warm or sterile) of the bunch. I may have bought the Vandys if I could have found a pair used. I think I liked the Vandys highs better than the Vivids but the Vivids play louder more effortlessly and cleaner than the Vandys. YMMV
- Vandersteen 7 Mk II
- Vivid Audio Giya G2 S2
- Evolution Acoustics MM3
- Wilson Audio Alexia Mk II
- Magico S3 Mk II
After hearing all above I purchased the Giyas which, to my ears were the most cohesive (blending of drivers), effortless at any level, accurate (not warm or sterile) of the bunch. I may have bought the Vandys if I could have found a pair used. I think I liked the Vandys highs better than the Vivids but the Vivids play louder more effortlessly and cleaner than the Vandys. YMMV