The 4 is a pretty good size, it fits an E-M1 with 25 or 45 f1.8 or samyang 7.5mm with the two unattached on the other side of the divider, I also fit in a small flash (Fujifilm EF-X20, hands down the best small flash for an E-M1 imo). Batteries in the side wings and SD cards in the front pocket and you're good to go. If you use a grip at all you need to put the body in at an angle (lens sort of pointing into a corner) and it gets awkward, however its still a fantastic bag.Looks like the 4 million is now $20. Just purchased. Actually think I'll like that size better than the 5.
Deal on the 4 mil ends in about 13 hours according to site.
5 million is sold out. now 4 million is on sale.It's $85, not $20, now.