Jcbach,
Having seen your musical choices makes it somewhat easier to suggest several speakers within your price range since, like you, my music repertoire leans heavily toward classical & opera (60%) with the remainder shared among jazz vocal, jazz instrumental, blues, big band, folk, rock, world and miscellaneous electronica in this particular order.
The names that came readily to mind are:
1. JM Reynaud (Offrande): known for palpability, expressiveness, immediacy, clarity & warmth. Great for Classical and Jazz, although the specs don’t look outstanding. 4 Ohms, 89dB/W/m, 30-20000 Hz. There are a few currently available on A’goN for under $4K.
2. Totem Acoustic (Forest): same as above. The specs don’t tell the whole story but let your ears do the judging. 4 Ohms, 87dB/W/m, 33 Hz to 20 kHz +2. Again, very versatile but the least efficient speakers of the 4 choices.
3. Chesky C-1: I heard these at the HE2003 and thought they were so refined! There were a few of us in the room who were classical & jazz fans. We were so taken by the speakers that we ended up staying about 1 hour and a half playing Mozart, Mahler, Dvorak and various Jazz tracks. The C-1’s were driven by a pair of Atmasphere monoblocks. 6 Ohms, 89dB/W/m, 40Hz - 25 kHz (+/- 2 dB). The only let down is with Renaissance Baroque music where I felt they could be livelier.
4. Meadowlark Audio (Heron-i, old model): Same as above. A tad laid-back. Blossoms with tubes though. Great on classical and Jazz. I currently own these and most likely will go with the JM Reynaud Concorde or Totem Wind in the future.
These a are revealing speakers and should be complimenting the quality of your new amp. Again, some may not agree with me. But c’est la vie.