Since you mentioned the Vandersteen Treo, which is a great speaker, may I recommend considering a good pair of used Vandersteen Quatro CT's. The Music Room had (perhaps still has) a pair for about $8.2k.
I have the Quatro's and find them to be very good and work well with th kind of music you stated that you prefer. I share those same preferences.
if that's not possible or preferable, then the Treo CT's would be just great.
Best of luck to you!