I have 100AW and it's a great little bag.
It's capable of taking quite a lot of stuff. There was a time when I used to carry K10D + grip + FA31ltd, and DA*50-135 and Sigma 10-20. Still having space for apple and biscuit
Since I sold my bigger lenses, I don't see need for bigger bag, unless I'm not taking 2 cameras but that happens rarely. These days, the bag easily takes K10 + grip and FA31, with 10-20 and F50 and Sigma 105. When I had K100s I could pack both of them in, one with DA40 and one with 10-20 attached and still had space for Sigma 105 as longer option. And of course apple and biscuit...
All in all 100AW is a great bag. I don't have experience with 200 but I think it'll let you pack in bit more. The problem then is, how much weight can one shoulder take! I really wouldn't want to carry more, for longer walks, then I described above.
BR
Peter