The Metallica intro is called 'Ecstasy of Gold', or at least it is on the album S&M.
I've just re-read you post and I'm sure you're already aware of that actually
"Nothing Else Matters" is tremendously good on that album. I always crank it up so the first 1:20 is at bleeding-ears volume, really is beautiful.
For those who haven't had the pleasure... Please watch it till at least 2 minutes in!

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