The Animals - House Of The Rising Sun.
http://tabs.ultimate-guitar.com/a/animals/house%5Fof%5Fthe%5Frising%5Fsun%5Fcrd.htmhttp://www.youtube.com/watch?v=KrPOCqO3xIg
This song incorporates some very important chords, and in a great progression because the song is awesome! Once you've learned the chords, you can try and play it the way the lead guitarist plays it.
From there - it depends on your musical taste, but OBV I RECOMMEND TEH METALZ!
Iron Maiden is great to learn. The reason for this is first and foremost, powerchords. Very important chords to learn, but I just know them as the sounds and numbers (i.e. 7-9, 5-7 etc)
If you know Maidens catalogue then you know they never really stop doing what they do (albeit the new album strays a fair bit from the coup) but Run To The Hills, The Wicker Man, Brave New World - AWESOME songs with everything a guitarist could want. Calm clean breakdowns, epic pentatonic solo's and ofcourse, the almighty gallop which always sounds great.
Acoustic open chords are the most important IMO. Without them, you just don't have a clue whats actually going on on the fretboard when you play.
Thanks man, I'd like to learn Maiden, but I will also focus on Blues musicians such as Stevie Ray Vaughan and Eric Clapton.