I like Audio Slaves first album, but Morello seems to have a severe lack of, whats the word, electic-ness with his riffs. Everyone of them, going back to the first Rage cd sound like a reworked version of the previous riff. And the "hey I can make all kinds of crazy sounds with my guitar" solos really get old after a while.
Getting back on topic, I really like the new Tool cd. One of their best IMO, probably on par with Lateralus, but not quite up there with Aenema.