For a bag that fits well with a suit, and can be used in a dressy situation, perhaps consider a neat leather bag from a higher end company like Bally, Burberry, Longchamp as mentioned before, or even Louis Vuitton. A charcoal LV bag in the Damier check pattern is less conspicuous than the usual ELLL VEEE repeated monogram and doesn't look at all like a camera bag.
In this vein, any neat and dark leather bag which looks sufficiently good can be used for this purpose. If you want to spend a bit of money, get a competent leatherworker to make a customized bag for you, something that looks the part but has enough room for your M and a couple of lenses.
My criteria for such a bag are:
- sufficient room for camera, two lenses, wallet and keys
- high quality zips with soft edges
- at least two or three sealable pockets
- wide strap to relieve shoulder pressure, preferably soft nylon and not leather
- black or very dark brown leather
- soft enough to mold to the body, but not soft enough to deform under the weight of a cloth-wrapped M
- just big enough for the above items, but no larger. Bigger bags are more cumbersome and less stylish with a suit, unless it's a structured valise/briefcase type.
If the design is stylish enough, it doesn't have to be leather, either. Tumi have the occasional nylon model that would look good with a suit.
