For a better security and trezor seems to be recommended choice. I like the body from the metal rather than the nano ledger. The protection of the trezor is more advanced rather than ledger. If you are store a lot of the bitcoin in that wallet. And trezor seems to be a very recommended choice. Why? To provide you high security and keep your amount safe. For the bonus, you can still save another coin into your trezor because it has supported another altcoin just like dash, zcash or even erc20 token..