Rain Song for sure- that song is epic. Over the Hills and Far Away comes a close second though. Tough choice though.

The Mars Volta - Octahedron

Alex Lifeson (Rush) talked about Jimmy Page being his biggest influence in this June 1980 Guitar Player interview: ... "Page was probably my greatest influence early on,"affirmed Alex Lifeson of the durable Canadian trio Rush. "Rush startedjust a little before the time Led Zeppelin came out, and when I heardthe first album, I thought, 'They're doing just the things we want todo; they have the sound we want to have.' And if we were that good, wecould have played like that too, if you know what I mean." ... Alex also mentions his admiration of Page and how he finally got to meet his hero in this March 2006 Guitar Player interview: ... "I wanted to look like him, and play like him and bejust like him," Lifeson remembered his youthful infatuation with Page,which came full circle when they came face to face backstage many yearslater. "You meet your hero, and he's a hero! He was everything I hopedhe would be - I'll never forget that." ...