Hi Andrew,
Yes, I received the upgraded Supreme and mounted it on my Brinkmann Oasis with a Benz Ebony L. I think it's clearly a step up from the Phantom II. Transients are cleaner, dynamics more explosive, and bass seems deeper and more coherent. In fact,the whole sonic fabric seems more coherent. So far, I hear no weaknesses in this arm. It's remarkably balanced and resolving with more organic wholeness than before.
Earlier Grahams (I've owned the 2.2 and Phantom II) could be criticized (justly or not) for an analytical tendency to "murder to dissect," especially in comparison to richer, more holistic arms like the Triplanar VII (which I also own and really like). Not the Supreme. I think this Graham combines musicality and highest-level resolution in exemplary fashion. Of course, this is just one man's opinion.
Bill