Hello,
Looking to buy a HW wallet, which one is best by all means, which also support alts.
Trezor or Ledger Nano S?
I have ledgerwallet and I am very content with it. There was a recent hardware exploit that took advantage of a design flaw in a chip used by trezor. Trezor has patched this with a firmware update, but keep in mind that it was a hardware problem patched with firmware. I am not sure if a similiar exploit can resurface.
There is no known attack for the ledgerwallet, and they use a different chip than trezor.