For either vehicle, a set of OEM half doors and uppers will be the better solution. They're a fair bit lighter than the full doors, and seal well against the weather. The kits for the JK were just released- they'll run around $1600 primered for both doors, windows, and the inner panels. A bit spendy, but NOBODY seems to have ordered theirs from the factory with halfies in the JK (sadly- I wanted them, and there was ONE in the Northeast at the time, and it was sold before I got to check it out
), so you will NOT find them used.
For the TJ, you'll likely be able to find OEM half doors for a whole lot less.
Best of luck! Mark W.