Only ever heard the Utopia very briefly out of an iFi Pro stack, the other summit-fi cans are strangers to me unless older HiFiMan flagships count. Been wanting to demo the Empyrean for ages but poop keeps getting in the way/I'm just too tired. Curious what the upstream gear was when you heard each, since sometimes those vastly improve the overall experience via synergy (I hate that word to DEATH but it gets the point across); just saying X is better than Y without context is, and I mean no insult, kinda useless. There's a whole glossary of terms on here to help describe sound and what you perceive, would be interesting to hear how the Sonoma stuff compares to other big deal cans point-by-point: https://www.superbestaudiofriends.o...ology-subjective-terms-used-on-superbaf.3400/ Also, no idea how to go about with the MOT thing. Ask a mod?