I think DACs are a very personal thing like speakers. One person's favorite speaker/DAC is "unlistenable" to another.
For me, I have not found DACs that I found to be superior to Chord DACs, including even the Chord Qutest. Other DACs might have specific characteristics that may be superior to Chord DACs, e.g. silence/lower noise floor when nothing is playing, warmer sound or artificially wider soundstage, but when properly setup, I just prefer Chord DACs. And I have listened to many very high-end DACs.
The real problem in my mind for Chord DACs is that they are extremely idiosyncratic. First, they are extremely immune to jitter but they seem to highlight any electric noise that comes through from your USB or coaxial source so I only exclusively use Toslink to feed Chord DACs and I have absolutely no electrical audio signals/sources connected to the Chord DAC to avoid any electrical noise. This is true even for sources as good as the K50 with exceedingly low electrical noise. A friend recently switched from USB back to Toslink output of his K50 and the Chord system sounded dramatically better. Second, often by default, Chord DACs can be set to 3V output which would clip some preamplifier and amplifier, including the Kondo KSL M7 Line so you have to make sure for those preamplfiiers to set the Chord Qutest output to 2V or for something like Chord DAVE, to take the DAC out of DAC mode and just set the volume to -7dB for 2V on RCA. To me, if you haven't listened to a Chord DAC that's optimally setup, you haven't listened to a Chord DAC. But others could argue that if the DAC doesn't sound good with normal setup procedures, it's not the DAC for them. But I do think Chord DACs are more true to the digital and analog source than other DACs.
It sounds like OP has listened to many DACs and knows what he likes. So it's unlikely we are going to recommend something that pairs well with Kondo more than he can figure out on his own through demos and listening tests.