I’ve been using a Nova 300 for almost 2 years at the moment. And have multiple feeds and DACs attached. I’d be happy to chat about what I’ve found with the amp.
One interesting thing to note, is that with a Windows PC and the Peachtree ASIO driver, I get native DSD 256. At least I found it interesting; since their marketing materials only stated DSD 128. When I called their tech dept to discuss, it was because “that is what you’d get with Mac OS” and they didn’t want to confuse users or have the support hassle of explaining why you need Windows to get the Native DSD rate.
I’ve never plugged one up to a Nucleus. I’d be very interested if it can reach native DSD 256 that way. (Or maybe Noris would know?).