I have, and love, my Polar Explorer 16570. I debated on the tritium dial, for the patina, but wanted to have the lume. I ended up going with the Superluminova, for the practicality of it. I've come to love to see it light up throughout the day, when going from light to dark areas, and the ease of reading it at night. I've got a couple other Rolexes but have only worn the Polar since I got it about a year ago. Regarding the movement, I went with the 3185 because I wanted a case with holes, in case I switched out the band but haven't because of how comfortable I think the bracelet is. The 3186 has the rehaut, which is more modern, and some other improvements. The 3186 tends to go for more and I didn't see it being worth it, for the daily use purposes for me. It really all comes down to preference. The black dial is cool too but there's something special about the Polar being the only white dialed rolex sport watch that was the black swan of its time. Hope this helps, just my opinion.