What the best 89-90 db speaker I can buy for 3k?

shubert how about Zu speakers. As I recall they have a couple options in your price range that are near 100db/w

Another speaker worth considering is the horn-based Tyler Acoustic speaker. It is reasonably efficient and has pretty good dynamics. The sound holds up well even at lower volume levels (very important for classical music in particular because of the wide dynamic range of the music).

I had to downsize from big speakers. I also listen to classical only. Consider the Kef Q900(91db)for $1798 a pair. VERY nice.

Two other possibilities:
1. Merlin VSMs although older models are supposedly not as suited to SS as the newest iteration;
2. Somewhat older Hornings if you look hard enough and shop carefully.
Caveat- Have not heard either w SS electronics.

Thanks Opus88, Q900 is on my short list, always liked KEF.
Keep reading Q900's are great but that R 900's are world beaters-LOL.