Going to get my first Eberlestock. I'm leaning towards the lighter and less expensive J34 but I don't want to feel Ian LR to haul a serious load. I currently use a Lowe Alpine 90L bag. The J34 is about 75L and the J107 is 80L. With my 90 liter bag I tend to cram it full of crap only to regret it halfway up the mountain. Can anyone compare the load hauling ability of the J37? Don't think I really need the fanny pack off the J107.