i'd agree that tool is as amazing as led zep (i like them much more, but led zeppelin are legends) but iw ouldn't say they compare live. teh great thing about zep is that they extend their songs live, they jam out live, and they'll even redo entire songs (i love the page and plant live album, just cause they turn nobody's fault but mine and no quarter inside out). The closest to that is Tool's live version of Pushit (which may be my favorite Tool song), but other than that, they never touch their songs. THey play 'em exactly like they are on the record. Don't get me wrong, they're amazing live, i've seen em four times, but they don't do what zep did live and i wish they did