I have my big Pelican case to keep my DVX in. But on occassions I need something smaller, in which case I use the Shell 3 as well. It does the trick, and not to terribly expensive.
I bought the Panasonic soft bag for mine. It's just big enough for the camera, batteries, AC adaptor, a box of tapes and headphones.
Fits in the airline overhead. I can't imagine why you'd want anything smaller.
You can see mine along with my other gear in this photo. http://www.pbase.com/siriusdoggy/image/40040348