That's great feedback Michael, and your speaker journey sounds interesting. I've never heard the N802 myself, but have always wondered what they're like. That you prefer the N805 midrange to the N802 says alot.
I had a pair of the N805 for a short period, and liked them, but then a pair of 805 Sigs (the ones I had to give up eventually) came along so I sold the N805 and replaced them with the 805 Sigs. So I have good memories of the N805, but honestly can't say that I had them long enough to form a strong opinion. They just came and went too quickly. Thinking back, doing A-B comparisons of the N805 vs. 805 Sig, I don't remember there being an enormous difference. Maybe a slightly sweeter treble, but I was trying a lot of different amps at the time so I don't know that my recollection is worth anything.
I'm guessing your enthusiastic recommendation for the 805N would extend to the 805 Sig - I don't think they're so far apart, like the 805N vs. 805D might be.
As for the PM1, they can be considered laid back compared to other speakers. Right now in my room I have them side by side, just for fun, up against some Proac D2. The Proacs have more air, more detail, and more crispness, but the PM1 have a very sweet warmth that makes it easy to listen to them for long periods. They're detailed, but not in-your-face detailed, if you know what I mean.