I just got a new bag for my ‘small’ Canon: a Capdase MKeeper 180A. My previous bag was too soft and I wanted to try something more solid. I looked through the Canon 500D bags and rather liked the rectangular MKeeper series. The 180 is just big enough for the 350/400/450/500/550 body and an extra lens. I could actually fit the camera body in with the extra battery grip, but that’s stretching the case a bit. If you take the camera without a battery pack, you can choose to store body and lens attached or separate. A really nice feature of the bag is the ‘raincoat’: in the back zipper pocket there is a rain protection cover that envelopes the whole case. Clever touch!