AS I have said a few times on here, speaker break-in suggests wear and if there is enough audible wear in a few short hours, then I wouldn't want to that speaker after 5 years of use.
I currently own the PB12-NSD, the one Mojo mentioned, and it hits pretty hard and is definitll hard to blend with the M80 for music, for HT it is awesome. I am waiting for the PB13 Ultra and am hoping it will blend a little nicer for music, by all reviews it should. Unfortunately the dealer up here has a 4 week waiting list
