16710 rectangular II dials

[hennabav]

I'm currently in the process of seeking a 16710 M series but I want to learn as much as possible before making any moves. I love the design of these GMTs especially the pepsi dials, but I also want these to retain value. I know these all have the 3186 movement and that is certainly the one I want. I was just curious, I know there are several types of dials. One is the normal II, the other is the stick dials, and lastly they also have the rectangular II dials. Which of these are most valuable from a collector standpoint. I've heard the stick dials are rare, but what about the rectangular II dials??