In terms of aesthetics, I really haven't been a fan of these off centered power reserve indicators. To me, the dial looks lobsided. Everyone has different tastes so it's always best to buy what you like since you're the one who's going to wear the watch.
In terms of collectibility, the PAM90 isn't one of the "hot" watches, so don't expect much appreciation in value over time, if at any.
Good luck with your choice, and please share some pictures when you make your decision!
Cheers,
Anthony

Panerai PAM90 Power Reserve