@MattTCG - I've been listening to a beta version, and the sound sig has changed for the final version, which I think I'll have next week. The final version supposedly has more bass and a bit more sparkle. That said, the beta units don't have the bass of the AD or A Prime. They are in the running though, and you can wear them out of the house without looking like a WWII aviator. The PM-3 betas are good. I anticipate the retail version is better. Does that help?