I have a similar setup as yours and I've been researching all the Pelicans. Most likely, its the 1550 model I need. I don't fly but I go on a lot of road trips. My equipment is usually on the bottom and the kids throw things on it. My recent trip to Vegas, I had a Crumpler bag and my old Zero 103 model. I had my good-old Sekonic 398 that I've had for YEARS in my Crumpler and somehow, the front plastic got cracked. Time for a hard case but the Zero is too small.
Like others, I'll probably stuff the Pelican with my gear on road trips, then take out what I need and stick it inside my Crumpler.