Glad to hear I am not the only one. When I was searching for my Holy Grail 870P utility gun setup, ghost ring rear on the receiver and trad Remington adjustable rear halfway up the barrel were both found wanting for a number of reasons.
While I have not (yet) gone to the trouble of having a vent-ribbed barrel cut down and fitted with "express" sights as the photos show, I am currently benefitting from the Remington "DEA" style barrel with the low-profile XS irons that can be concentrated on, casually noticed or completely ignored... as circumstances dictate.
In the distant past, Steve Rose threaded an 870 18.5" police barrel for me, and it was very nicely done. I payed it forward in an uncharacteristic moment of philanthropy, but it made for a pretty decent do-it-all barrel.