Have you looked into Outlaw or Anthem?
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Nice device. Very stable. Has an upgrade path for when tech comes out. NAD sounds neutral which will be a fine pairing with Vienna Acoustic.
The most important feature is Room correction and they recently upgraded to DIRAC Live vs Audyssey which is a big leap forward. Audyssey hasn’t been updated for years. Same version from lime 2013.
I literally have one in stock here.
Alternatively, Anthems ARC is superb room correction. Not better than DIRAC, but also not worse. Their receivers are nice and can’t criticize them. I like NADs sound profile a little better but that is personal taste.
Marantz and Denon are fine. Great sound but both use dated Audyssey.