Metallica - Fade To Black. While not strictly metal, due to being played on a classical guitar, the haunting introduction to Fade To Black is the beginning of an epic which shows, especialy in the early days, how eclectic America's biggest metal band really were.
The chord structure is reminiscent of the introduction to Stairway To Heaven in the classical section as the chords remain similar while the bass note changes to alter tonality of a repeated passage. It's best you fingerpick this section, using the guide provided and this key.
The first four bars repeat under an electric guitar solo and then the last two bars accompany a 16th note run around the 12th fret leading in to the first verse.
As for equipment, failing a classical acoustic or classical electro acoustic (this will aid you as you are less likely to mute the strings with your fingers as you fret the notes) a strat's neck pickup with no distortion and the treble turned up should sound great and is a similar setup to what Metallica often use to recreate the sound live (both guitarists are very protective over equipment and settings they use).
Look out for the electric intro solo that accompanies this section in upcoming columns.