Don't worry about weight, you'll stop noticing it as soon as you get on and pedal. Geometry is important though, and the dutch bike will start to hurt your backside after an hour in the saddle for sure. More of that weight needs to get off of the saddle, you need to get into a better position for power transfer. A touring bike is made to be as relaxed as possible while still allowing you to do long distances.

And if you like the Sojourn, get it. : ) If you like the aesthetics, every time you look down, who knows, you may get a little boost. ; )

Works for Niner Riders: http://www.flickr.com/photos/21753775@N03/3385532000/