Hi Nezwek. While I've never owned floor standing speakers like the ones you're considering, I do have great experience comparing Sonus Faber and ProAc mini monitors. I own both Sonus Faber Concertinos and ProAc Tablette 50 Signatures.
Like Kjg's post above, I enjoy the listening experience much more with the ProAcs. If you are concerned with bright sound, the SFs are more forgiving in my system. They also have a fuller midrange and less extended highs than the ProAcs. The ProAcs have a slightly leaner midrange and more extended highs. And if you don't have a lean system the ProAcs will reard you with a massive soundstage and lifelike experience the Sonus Fabers won't be able to match. The Concertinos have a very nice sound, but the Tablette 50s are so much more accurate and involving.
If you can, definitely audition a pair of ProAc Response 2.5s. I've had great results with the ProAcs, but only your equipment, your room, and your ears can verify that. Good luck!
Like Kjg's post above, I enjoy the listening experience much more with the ProAcs. If you are concerned with bright sound, the SFs are more forgiving in my system. They also have a fuller midrange and less extended highs than the ProAcs. The ProAcs have a slightly leaner midrange and more extended highs. And if you don't have a lean system the ProAcs will reard you with a massive soundstage and lifelike experience the Sonus Fabers won't be able to match. The Concertinos have a very nice sound, but the Tablette 50s are so much more accurate and involving.
If you can, definitely audition a pair of ProAc Response 2.5s. I've had great results with the ProAcs, but only your equipment, your room, and your ears can verify that. Good luck!