I had the DNA rev A modded mono blocks 15 or so years ago with some Joseph Audio’s. I don’t know the mods SMC are doing now. The amps were very very nice. I don’t know how to describe it but they were a little thick or warm in the mids and detail wasn’t as airy as I wanted but the were very musical and I really enjoyed them for around 5 years. I know McCormack mates well with Vandersteen.
Send the pictures of your boards to SMC from what I was told the older version boards will fail. I was considering getting a DNA-1 few months ago because even though I complained about it I still miss those amp. They definitely play with authority
The guy I bought my Don Sachs amps from bought all Dennis Had gear. I drove to pick up amps in person and listened to his Had gear and thought it sounded very nice. He was an older gentleman and the Don Sachs gear was to heavy for him and had to let it go.