I think it would be smart to use the P w/flats for "classic" scenarios and the Ray for all the rest. One passive bass with flats and one active bass with rounds would be ideal for my needs, I guess.
That's exactly what I do. My P with flats for my vintage rock bands and my Stingray for everything else, more modern stuff, RHCP etc. I don't have the new Special, but the older 2 band version (which was always my favorite, the classic ray tone). I never got along with jazz basses much, I love the thicker necks of Ps and Rays, and the tonal rampage they both do in their own way. So thumbs up man, I approve for sure!