I have a Kata DR-466 backpack...it seems to be pretty good for me atm But may be looking for a more 'secure' one, as I am going on a boat cruise early next year. Possibly one with the openings against your back, instead of on the outside... what do you think ? Is there more secure ones out there ? I must admit, I only thought about this last night, so haven't really had a look around yet. But I will look up some of the ones mentioned here.