That LowePro Edit 100 looks good. There's not much choice where I am located, but with a trip to the big city later this month I will be on the lookout for something like this.
So far I've been using a small lens pouch on a padded waistbelt for when the camera is in its smallest configuration, ie, with just the EF-M 22mm STM. This works quite well. For when I want to take the EF-M 18-55mm and 90EX I've been using a LowePro Z40 pouch with a shoulder strap. However, it's not quite big enough and something like the Edit 100 looks better.
I also have a LowePro Inverse 200AW beltpack, which takes all the EOS M kit plus the EF-M converter and some EF or EF-S lenses. This is too big for general everyday use, but useful for trips where I want more gear with me.
The main objective was getting away from having anything on my back. A heavy backpack full of DSLR bodies, lenses, flashes, ballheads, etc., is something I have had enough of.
Some photos at this link. I can't post photos here as hotlinking is disabled.http://phil.uk.net/photography/canon_EOS_M.html