I love the Legacy leather too. But in terms of weight, the Ergo is SO lightweight. I didn't think I would like the hobo, but I loved it once I tried it on. I couldn't get over how light weight it felt. Have you considered that so you don't hurt your back?
Lynn, I think that is a good idea. The hamptons nylon hobo is very lightweight too. You may want to keep a leather bag for occasional use and use something light for everyday.