I've been using a PAC for the past week, and I have to say, with a similar sized load, but chrome is way more comfortable. Sure I can fit a crapload of stuff in it, but the chrome seemed perfect ergonomically....
I'm using a right swing bag when i'm used to a left swing. Not sure if that could account for my shoulder being reall effing sore or not. The bag i'm using is like 4 years old, so perhaps its just worn out.
But i'm not trying to state that the PAC sucks, but that the chrome is (to me) a much more comfortable bag than the supossed top-end messenger bag...
-R