Whatever speakers you get, add room correction to your budget.
You could connect a Minidsp DDRc-24 between your Pre-out Main-in on the amp and run everything through Dirac live.
It’s amazing the peaks and troughs you will clear up below 500hz in just about every living room.
You might even find you don’t need a speaker upgrade…although Dirac+new speakers is always going to be more fun!