I can't believe I'm the first to say this, but One (originally by Metallica) is a really beautiful song when Metallica does it, but when Apo gets a hold of it, it's really breath taking. I know they shortened it a bit, but it is still wonderful. The skill that it takes to play that song by either band is remarkable.
ETA: Oh I guess o0ApocalypticA0o did say One smile Best cover in my opinion.
ETA: Oh I guess o0ApocalypticA0o did say One smile Best cover in my opinion.