IMO, there isn't a single bag on the market that even comes close to being as good as the Kata Sundo-1 for what we do. Unfortunately, it's a pretty expensive bag. For some reason, I have never found another audio bag designed with a clear top-panel that completely zips up to prevent against rain or beer spills. Most audio bags rely on velcro flaps and would not protect against bad spills.
There are a lot of other great features to this bag, but the zippered top panel is my favorite.