I upgraded my DAC from the one integrated in the Cambridge Azur 851N to an MHDT Orchid which ran $1400 (with an upgraded tube). I went from very happy with the Cambridge DAC to totally thrilled with the Orchid. The Orchid is very organic, musical, and analog like, with a slight bloom often attributed with tubes.
It's also relevant to point out that I have the Orchid using a Shunyata Venom VR NR power cord and connected to the Cambridge streamer with a Shunyata Alpha SPIDF cable.