I don't wish to upset the equilibrium of your decision-making but you should be aware that the Adventure is the best sailer of the kayaks by a country mile and if you are thinking of spending a lot of time sailing then you might want to consider it as an option.
The reasons are the daggerboard and the hull - the daggerboard gives it far better upwind potential than the other boats and the sleeker hull just makes it a better sailer by dint of being that bit faster.
It shoud be said that it is unlikely that you would want to stand up in an A (I think fly fishers do it standing up ? - in kayaks anyway).
And that, knowing the Columbia (I windsurfed there many years ago) it may be that you plan to sail upwind, like I did then, by just sitting in the current... in which case the upwind performance may not be an important consideration.
But these factors aside the inescapable fact is that the Adventure sails best and I for one would not wish to go back to sailing an Outback let alone a PA.
Hope this does help