Newbie want to improve what I have

You could have done a lot worse. Hard to make suggestions but tell us about your room and speaker placement. 

Wire is not a tone control. Stick with what you have.

Nothing wrong with your choices! I presume the M33 is a streamer/DAC/amp? Then you are limited to the streaming services' music offerings. You don't know what mastering variation was used. Some are better than others. That is why I prefer to own physical copies, LP's and CD's, so I can choose the best versions.

you have learned the hard way about system matching

 

did you listen to the combo or did you order everything and are now listening to the system

 

the nad m33 is an excellent amplifier but it is too clean for the sopras you need a warmer amplifier 

 

you have two options

 

1 sell the m33 and move into a warmer integrated amplifier

We are a focal dealer the Unision research unico 150 sounds amazing with them

 

or keep the M33 and use it as a streamer/preamp and use a warmer power amp

 

dave and Troy

audio intellect NJ

Focal, nad, unison dealer