Let's all be honest here, the only way for anyone to really know what bar setup they prefer is to put the dang things on and live with them for a while. Especially making small changes to get to where it feels best for you, and then riding a lot, including working up to riding day long rides like we do touring.
all this is pretty much why most of us have a box of old stems, old bars, old grips.....
Personally I prefer drop bars for touring, and the big advantage to the drop bars you're considering is how they will be higher. Don't be concerned about using a short stem and twitchiness, on my touring bike I have a 50mm and the bike handles wonderfully. My steerer is also long so bar height is nice and high.
I'd go the dropbar route first, figure out stem length, reuse old tape and if you don't like them, resell the bars. Easy peasy at low cost. Heck, buy a couple of used stems of different lengths if not sure.