I’m no expert and have not experienced the N150 or U2 my understanding is they are among the best out there for sure,however…
you already a streamer set up to die for with upgrades you have implemented. I would assume the rest of your chain is top notch but from my nooby perspective MQA has not lived up to its promise overall and dsd content is so limited in availability. Diminishing returns comes mind. I’m not knocking your desire for a better streamer (really trying learn something here). Have you ever heard anything that performs additional MQA unpacking beyond the Bluesounds protocol?