After further consideration, I ended up with the tamrac cyberpack6. It wore best in my ad hoc testing. It's farking huge...and I need more gear to fill it up!!! hehehehe... The 20d without the grip looks a tad small in it. Other than that, I can fit in the camera with whatever lens is on it now. Mucho better.
It arrived at work today and my coworkers thought it was a piece of luggage. In a way, I suppose....
So, any problem flying with flashes in your backpack, or do you have them checked?