I can’t emphasize enough the use of a preamp with the DACs at least in my experience. It was slightly sibilant and thin sounding in my system with my Magico S1 Mk2 in all my direct testing of several DACs with volume control.
I am presently using a Pass Int-60 with a Chord Dave. I have now sold my S1Mk2 and awaiting delivery of S3 Mk2. I considered like you the S5 and Q3 but my room is 11x14 with 10ft ceilings so I think I’m even pushing the envelope with the S3 Mk2. I was very happy with the S1 Mk2 but upgradeitis got the best of me.
I am presently using a Pass Int-60 with a Chord Dave. I have now sold my S1Mk2 and awaiting delivery of S3 Mk2. I considered like you the S5 and Q3 but my room is 11x14 with 10ft ceilings so I think I’m even pushing the envelope with the S3 Mk2. I was very happy with the S1 Mk2 but upgradeitis got the best of me.