@sim_audio_nerd - I have the Merason Dac1 MKii but have not heard the Reuss Dac. I am using it with a Gryphon 120 amp and Dynaudio Heritage speakers. It’s a marvelous sounding system. I have also used it with a Conrad Johnson Classic 120 amp with EL34 tubes and QLN Prestige 3 speakers which is very warm sounding system. The Merason Dac1 MKii is a very smooth Dac and makes for long listening sessions. It’s a keeper and I don’t see myself ever selling it.
With the CJ amp and QLN speakers I am going to demo a SoulNote Dac which apparently has a more forward presentation.
As with all things, I’ve come to realize it’s all about system matching.