Amplifier for my new Focal Sopra no2

Lot's of good options for you.  I'm running an Ayre AX5/20 with my Vandy Quatro's and love it.  Will be upgrading to Richard's new mono blocks I think, but if you can find a used AX5/20, it's a nice combo with your speakers.   I've heard this combo on a few occasions and felt it was a wonderful match.  So much speed and micro and macro detail.  The tone was still spot on and it threw a wonderful soundstage.  Never felt it was lacking in drive as it had plenty of power to run them.  JMHO

Need to study, do audition and start savings...

That’s where the fun is...

@syk 

Your Naim NAC N272 is upgradable with the addition of a Naim external power supply unit such as the XP5 XS, XPS or 555 power supply unit to achieve better sonic results. You should try that and will be rewarded with the results. 
Naim products can easily be upgraded by adding Naim's external PSU. 

Yes.  I have studied that as well and a friend, who is a big Naim fan, strongly suggests the upgrade of power supply.  His view is that sound would be more airy, rhythmic and musical.  

Yes indeed. Adding a Naim external PSU will significantly improve the sound quality and musicality.

Or alternatively there’s always room to upgrade to a higher end Naim standalone analog linestage preamp with external PSU and a separate Naim streamer + separate Naim DAC as well as upgrading to a higher end Naim power amp with external PSU, which will take the overall performance and musicality to a whole new level.