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And it's funny you mentioned that part about losing it, because the one I got is able to be put onto a keychain much nicer than the others because it has a gigantic hole on the end. It's the Ledger Nano S, you should check it out if you haven't ordered a wallet yet: https://www.ledgerwallet.com/r/07e0

Yessss, they are selling out FAST! I believe the Trezor might be the easiest to get, my friend @sal.tedder has one.