Lol, easier said then done. After going though this journey the last decade. For price/performance for me I narrowed to following choices.I would have thought we could come up with a longer list ...
Higher budget:
1. ATC SCM50 ASL (active) (no need to worry about efficiency).
http://atcloudspeakers.co.uk/hi-fi/loudspeakers/classic-series/scm50/
2. Legacy Aeris - Bass section is powered hence Benchmark AHB2 is enough, comes with room correction + pre amp + dac (WAVELET)
https://legacyaudio.com/products/view/aeris/
Moderate budget:
3. ATC SCM19A (active) (no need to worry about efficiency)
http://atcloudspeakers.co.uk/hi-fi/loudspeakers/entry-series/scm19a/
4. Legacy Calibre XD (ask for XD , the website does not seem to have it, bass section is powered by class D).
https://legacyaudio.com/products/view/calibre/
I would say except for Aeris one would want to get a proper sub-woofer. No matter how good the freq response is room correction, placement and calibration is must. Else any good speaker is not worth the $$ unless one can treat the room and sit at the perfect spot.