Think Tank Urbane Disguise 20, I've got the 40 and it's really nice but really dull looking (intentionally), kind of corporate or not, without showing off, I'm going to get the Urbane Disguise 30 as well so can carry a gripped body and just two lenses which include my 70-200 2.8 and some stuff. It's the same size as the 40 but 4" shorter, kind of like a small shoulder brief case that's far too small to carry a computer.
The 20 does the same but is shorter for slightly shorter lenses and designed to carry a body without a battery grip and if you want you can wear it with a waist belt as well. Really well thought out. I think it also makes a good photojournalists bag, with place for notebook etc.
The two photographers who turned me onto their cases both travel all over the planet and try to keep as low a profile as possible and yet be able to work out of the cases as well. I'm thinking of getting the Speed Racer as well which will fit the needs of a certain project I'll be working on off and on all fall and into this winter but is more obvious as a camera bag, as you wear it with a very wide brace/belt around your waist. but for most of my shooting here in town I'll probably gravitate to the 30, carrying mostly the 5D gripped, with the 70-200 2.8 and either the 85L 1.2 or the 24-702.8, 1.4 tele-extender, two 12mm tubes, cable release, white balance thingy, CF card wallet, Rocket Blower, lens cloth, ziploc bag with minimal neutral/shine makeup kit, my cell phone and purse/wallet and I'm good to go. I basically got one kit down to this and kept looking for the easiest and least obvious bag to carry and became most pleased with the Think Tank and Domke bags but don't like the metal clip that holds the lid shut on the Domke bags, but they might be great, I've just never used one, I really do like their divider insert though. I'm in many situations that I'll carry that Urban Disguise bag all day as a purse and only need the camera for an hour at the most but it keeps me with it rather than trying to lock it in the car which I won't do.