The troll is not designed around a drop bar; how does the top tube length look compared to your road bike? There is a really long thread here on mtb drop bar conversions and the top tube length can be a problem.The Piolet frame geometry may be better optimized for a drop bar.

Also the camargue is still available in your size. That may be a better bike for your intended use.

http://store.velo-orange.com/index.php/frames/camargue/camargue-frameset.htmlhttp://store.velo-orange.com/index.php/frames/camargue/camargue-frameset.html

And it's on sale since they're discontinuing the model; too bad I really liked it.