I am currently waiting (anxiously) for my new pair of VSM-MM (studio black). I have listened to 2 pairs of VSM-M and a pair of VSM-SE (with my own equipment, I might add) prior to placing my order. While I have not had an opportunity to listen to the MM or MX (premium finish designation), the new versions are said to be somewhere in the order of a full third more open, relaxed, natural, detailed, and spacious than the VSM-M. From what I heard from the VSM-M, I would be flattened in my chair with the newest version, and I CAN'T wait!
Just my 2c. Hope it helps.
Just my 2c. Hope it helps.