I picked up the P7 and burned them in overnight. Sounds about like what I remember in the best buy I demoed them in which is a solid, enjoyable sound. The issue I am having with them and may be a cause for a return is the vocals. They just sound too removed for my tastes.
I prefer a more front row vocal presentation so I'm not sure where to go next, maybe PSB? I'm going to mess with the eq a bit and see what I can do. Does anyone know if the Apple stores have the m500 on display?
The PSB's mids are certainly not pushed back as they can be on the P7s. But they are big headphones.