Speaking of the "Busse of Packs", you may enjoy checking-out
Mystery Ranch . I have an older Dana Alpine (replaced it with the Osprey mentioned above) and it is truly an amazing piece of work. As the story goes, Dana Gleason turned his attentions to filling military contracts and sold the consumer brand to K2. Now he's 'relaunched' his consumer-side business selling his stuff to hunters, tactical users, and adventurers. I haven't seen a MR pack in person, but 10 seconds of research into the pre-K2, 'Dana Designs' packs should convince you that this is quality gear. (and guaranteed for life!) <img src="/ubbthreads/images/graemlins/thumbup.gif" alt="" />
Edit: I shouldn't have said "replaced". I should have said, "augmented". Much more than 50# and I'm going with the Dana.