Jeez, I can't think of a good solution at all that would "suit" you perfectly...that thing is gonna get crumpled up in just about any backpack.
But the title..."commuter backpack"...well I just happen to be a backpack whore. My wife says I have an actual problem. But after numerous backpacks all over the price spectrum I've found my favorite every day/weekender/bug out bag ever, the American Kargo Commuter. I love the giant main cargo area, the worksmanship, the way it looks, and how comfortable it is to ride with. Love love love this backpack. As far as a suit goes I'd say it can't get much better than this one, there's def room and perhaps it can be neatly folded in such a way it'll arrive crumple free. Check out the video review on Revzilla then buy from a sponsor.