After many comparisons of external and internal dimensions, both information on the Internet, including by measuring at the store, I have the Tamrac Evolution Messenger 2 selected.
The bag has a removable inner padding yes, quasi a bag in his pocket. And that's the problem, because the actual bag is already well gepostert. With the typical Innenposterung inside the bag is padded quasi double, making the ratio of volume to wall interior volume, ie outside dimension internal dimension to very unfavorable.
Another drawback is the lack of rain protection. While other photo bags even include additional rain covers, are not even sealed properly here the corners. How bad would the impact, I can not judge, probably depends on the intensity of the rain.
The giant Velcro closures that are unnecessarily applied in addition to buckle, interfere.
A travel tripod can be attached to nowhere, it fits an iPad or netbook purely what I personally do not need at a Photo-day tour.
I keep the bag anyway, lack of alternatives in this price range.
At the photo application I use them without the inner bag. The camera comes so into his pocket, the small MFT lenses come in professional Wraps packed in the bag.
For the Velcro fasteners I think about something else, maybe I separate it from.
The advantage lies in the pocket of the flap at the top, through which one can see the camera quickly when needed.
Alternatively, I still use a large, normal messenger bag with a separately purchased indoor use (upholstery). This solution has the advantage that you still etc. a warm sweater on a photo tour, for example, can pack an. However, this use alone cost as much as the evolution. 2
For even shorter photo tours with the OM-5 I use with success a Crumpler Quick Escape 700, which has a pleasantly large opening at the top.