Have asr emitter ii, dcs puccini. speaker advice ?

Dear friends,

After some years I have a nice setup:
- asr emitter ii execlusive
- nordost valhalla rca
- dcs puccini
- shunyata power cords and hydra.

My beloved speakers are proac 3.8 and i'm using transparent super xl from amp to speakers.

Although I like the relaxed sound from my setup, I'm looking for better speakers in terms of speed, detail and soundstage.

Any advices? Price range for the speakers is EUR 12k used.

thank you