My favorite version of Aqualung, which I believe I mentioned at one point during the Yes discography thread when Eddie Jobson was mentioned, was a live video from the A tour with Jobson on keyboards, and was memorable because it was the first time my young guitar and drums loving self said "that's a pretty good keyboard player." Classic song, but not my favorite from that album, as that honor goes to Wind-up, but hell, the entire album's a classic.