Philip, I have no experience with your particular speakers except some of the older model hybrids and the Summit. I would assume they're still difficult to drive speakers as are with the other ML models. I still have and kept my first generation CLS and remain as a reference. Tube components are great with them in most cases which you probably may have tried as well as some of the newer SS amps. I've heard Spectron amps and they sound great with panels too.
For DACs: Linn, Weiss, PS Audio, Berkeley, Ayre, DCS would most likely have most of the attributes you're looking for. Great extension across the band, airy(low noise-low distortion), live presence, not harsh or edgy sounding, flexible interfaces. Bring a couple of DACs home for actual comparison, one of them will surely match well with your system and to your preferences. Do keep us updated.
Best,
For DACs: Linn, Weiss, PS Audio, Berkeley, Ayre, DCS would most likely have most of the attributes you're looking for. Great extension across the band, airy(low noise-low distortion), live presence, not harsh or edgy sounding, flexible interfaces. Bring a couple of DACs home for actual comparison, one of them will surely match well with your system and to your preferences. Do keep us updated.
Best,