They are very reef safe, however they can be very territorial once established, particularly to new fish. I would prefer to have a more open tank for this fish as he ages, lots of LR is nice for filtration, but this fish needs flow and area to swim more than anything.
T316 I would very much disagree, I owned an Achilles for 5 years (very close relative to the PB) and it is the most dominant fish I have ever owned, which includes a list of Tangs, Triggers, Wrasses, and ANgels etc.
All fish are different, but Acanthurus genus Tangs are known to be very very bossy.