maxpwr said..
Sounds like you have all the info to answer your own question -are you happy holding onto the 5m until you can get going on the 3.6m?
this? if you already have both don’t you already know if there is a gap in your quiver?
depends on dimensions of you and your gear but i agree with airsail personally, 4.3 gets me going in 12kt and below that it is time for other toys. 3-3.6-4.3 is my quiver,3.6 used 80% of the time, 3 above 25kt.