If your keeping the full doors and switching between the two, may as well go for all of it
I'd think the worst that would happen if you got a decent kit, is the full doors would be worth a bit more cash if you sell them. Up to you if you want to do the work though.
Mine doesn't have power locks/windows so I went with a simple one-button remote plus alarm. I had all the extra goodies on my Lincoln Compustar setup, took a bit to wire it all up! With the Jeep I won't use it in the summer anyways as I plan to take the doors off as much as possible