Hassey bag alert...
The Billingham Hadley Pro is perfect for the HB 500 V cameras with lens and hood attached. The X1 and charger/batteriies go in one end compartment and the rest of the main compartment perfectly fits the 503cxi with 80/2.8 lens and hood attached. Using a divider for a long trap door in the main compartment, a second 500 identical in size can ride in the top. Or in my case, it remains empty for any other items to carry for the day.
Film, and all miscellaneous items go in front pockets and various other places. The inside pocket holds an iPad 2. The outer zip pocket is empty presently.