Vaude has what I think is a superior product to the Ortlieb for the handlebar bags. You can get a locking klickfix independent of Ortlieb. The Vaude aqua box is stiffer. Not sure if you'd have similar snap problems, Ortlieb does have a longer warranty than Vaude but as mentioned above snaps are cheaper to user service than return shipping.
http://www.vaude.com/epages/Vaude-de...ucts/109155460