ATC SCM20 Passive - look for a second hand older model pair (pre SL are cheaper) - be patient.
Based on your requirement;
and
....basically you have described the ATC SCM20 to a tee
120 Watts should be plenty to drive them in an appartment. Telarc use them.
Based on your requirement;
voice, piano and violins
and
....good realistic sound stage, transparency and accurate uncolored sound is important. I'd like nice tight bass...not overly heavy, mushy. And of course a solid mid-range and clear, effortless , non-strident highs are important too.
....basically you have described the ATC SCM20 to a tee
120 Watts should be plenty to drive them in an appartment. Telarc use them.