Personally, I am using Billingham Hardly Small.
and also some comments of those who are long-time user of Billingham bags..how long does your bag last? And if you don't mind, post a pics of your well-used bag.
I used to use a Billingham, but sold it because it was too boxy and stiff and not comfortable enough. I bought it because of the colt following... just to see what's so great. Couldn't find anything great about it and got myself something more flexible and better looking.