Sell the CX it is a good streamer but not that good, and as a transport you are going to introduce a lot of jitter.
All the units you mentioned are great.
Mytek Brooklyn Bridge great dac, MQA, good preamp, good heaphone amp.
Lumin great app, MQA fantastic sound quality, makes an excellent transport.
Teac also excellent we haven't tested it.
Auarlic also very good.
Dave and Troy
Audio Doctor NJ Lumin and Mytek dealers