I have the 2500 and wore it for many years until I got the new Speedmaster in January. In fact I wore it today (and yesterday) for the first time since.
I love it, but after wearing the Speedmaster, the PO is noticeably chunkier and heavier. I have become used to the lighter tapered bracelet on the Speedmaster now, so much so that everything else is heavy and bulky.
Still love the PO (2500) though. One of the best dive watch dials in my opinion... I like the open 6 and 9, and the fact that they are printed, mixed with the applied indices.