Blue Sparkle
Contributor
I can see how one might have a collection of wings for different applications. I'll probably start with a minimalist one for my singles diving, and size up if and when I decide to do doubles.
Although my "for at least the near future" diving was not the same as yours, I made a similar decision, which was basically to buy a wing that was "just right" the type of diving I knew I would be doing all/most after my OW certification, and then to add other wings as/when necessary.
For me that was "tropical" warm-water diving with single rental aluminum tanks, which translated to a narrow, 17/18# wing. I've never wished I had a more "all-purpose" size/shape wing, and will gladly buy a larger or different one when the time comes.
(I realize you are talking about singles vs. doubles, but I used the same criteria for singles vs. singles but different temps/tanks/etc.)
Blue Sparkle