While the general party line is that speakers don't know what kind of music they're playing, there are definitely some speakers that work better or worse with different kinds of music. If you favor rock music, I would consider used Wilsons, which are excellent values, IMO. If you favor natural vocals and acoustic music, I prefer Harbeths or KEFs. The Monitor 40s are one hell of a speaker.
Still looking for speakers in the 10-20,000 range
I’ve heard Proacs, Personas 3 and 5, Ryans, Wilsons, Wilson Benesch, Monitor Audios, B and Ws and several others in the 10-$20,000 range. My favorite so far is the KEF Reference 3. I would consider the Reference 5 but, as I’ve posted before, there is no place to hear them within 400 miles. Still plan to hear the Focal 2 and 3. Unless I love the Focals, I'm inclined to either go with the KEF Reference 3 or wait a couple of months (or more) to check out the new Magico A3. My room is 24x18. I have Audio Research electronics and 20 plus year old Proac Response 3.5 speakers. It’s been a long process and I’m not sure if I’ll be relieved or disappointed when it ends. Hard to decide if the Magico’s are worth waiting for. Thoughts?