Integrated amp for Focal Sopra 2

What aspects of sound reproduction do you value most? What amp are you using now, and what specifically would you like to improve upon?  The usefulness of any suggestions you get here will be directly proportional to the amount and quality of information you provide.

i did not know that naim and focal are under the same ownership

cool!

Currently have Bryston b135 integrated 
Important to me inner detail and deep soundstage 
‘What integrated might be a significant upgrade?

https://www.usaudiomart.com/details/649647608-valve-amp-company-vac-sigma-170i-integrated-tube-amplifier-amazing-soundstage-and-build/

https://www.usaudiomart.com/details/649616064-jadis-i50-with-remte-3-years-old-with-50000-worth-of-nos-tubes/

no affiliation

What’s your budget?  New or used?