I own both the CA 851n and the CXN 1. Both are good but prefer my PS Audio Directstream with Bridge II overall. CA has no Roon or direct Qobuz connection. I use Airplay for Qobuz. I have not heard the Bluesound. Purchased both as opened box/clearance from CA with warranty. Very good units for the price, especially when connected via wired internet as opposed to WiFi.
https://www.cambridgeaudio.com/usa/en/products/openboxclearance?f%5B0%5D=category%3A10
https://www.cambridgeaudio.com/usa/en/products/openboxclearance?f%5B0%5D=category%3A10