I'm looking for a waterproof duffel, not too big, maybe 24 inches long for a 2011 R1200RT. I am deciding between the Woflman medium, the BMW, and the Sea Line. Number one, will these work well on the RT? I ride one up, so having it on the pillion is fine.
Also, I have looked at other brands like the Ortlieb and Helen, but the Ortlieb has no mounting points which I think is a bonus, and I'm not sold on the materiel on the Helen. I'm really wondering if I even need to mess with the "roll" design to close the bag. That is kind of a turnoff to me, that is partially why I was considering the SeaLine Zip duffel. I also want a bag that is black, so it's unobtrusive.
Contradicting myself however (which is my hallmark ) I am interested in the large BMW bag, which closes easily, and is totally waterproof. I don't care about the cost as much as something that is visually appealing, and also the most functional.
Input on size for the RT?