OK, I have a TriStar, Aeronaut and a RedOxx CPA (for my go-kit as two eBags large packing cubes fit nicely). I have a brain cell (the small one #5) for my laptop that I normally strap into my TriStar for normal travel.
The TriStar works great most of the time but it is a bit large for EDC. I really dislike messenger bags as I hate having to open the flap to get to everything but an Empire Builder or Zephyr would be OK. I'm leaning a bit towards the western Flyer.
OK, so this will go into the case:
12.5 inch laptop - either in a sleeve or in the brain cell.
Charger for laptop (probably one of the new iGo chargers - a little wider but thinner than most)
4 cell chargers
Handful of file folders - maybe 3/4-1" of files
Monster Cable Outlets-to-go power strip
1 Satellite phone
1 large'ish cell phone
Blackberry Playbook in an Otterbox case
iGo int'l plug converter
I also hate, hate, hate backpacks.