I bought a M3i Zero from RHS.. It works great so far. (I was a little hesitant about ordering one because of how many people have bricked theirs.)
Very reliable, Fast shipping and Excellent customer service
The only game case that can hold more than 10 games (That I'm aware of) Is the Nintendo DS Game Card Case 16 just search for it.
It's pretty compact so it shouldn't slow you down. (Though I don't believe it's "pocketable")
It's not the movies or games downloads that I would worry about, like breaking into networks, downloading encrypted things, spying on network traffic. I have seen so many "Top Secret" seals on files when I was a kid
I was obsessed with finding UFOs, a surprising amount of US files where stashed on computers in other countries, China back in the early 90s omg sooo much