upgrade advice from Sunfire CRM2 monitors

Hello,
I'd appreciate some purchase advice for new monitors.

They would have to be a significant improvement from my current Sunfire CRM2s.

They would be wall mounted (WAF requisite) not too big and installed in a medium sized non dedicated room (25m).
Currently I use a 200 wats/channel Crestron 7x200 amplifier, connected to a Sunfire Ultimate receiver as pre.

I also have a diY 10" subwoofer conected to the sunfire receiver, hence I'm not looking for extended bass from the monitors.

Low-medium listening volumes and varied music styles, includeing movie watching. I favor musicallity and great midranges.

Would rather buy second hand and budget may go up to 1500USD.

I have considered Usher monitors, and some oldie Sonus Fabers.

I would appreciate input from people that has already upgraded from Sunfire CRM2s..
Thanks in advance
David