One of my all time favorite artists is Audioslave. Why? Well not only do they have awesome intricate lyrical yet still heavy guitar and drum rifts, their lyrics are good. They are not one of those bands you listen to just for lyrics or music they put both into a hypnotic mixing bowl of musical genius. some of there better songs are Like a Stone, Shadow on the Sun, Be Yourself, and Show Me How to Live. Like a Stone uses a interesting book analogy to present the life of the singer. (weather its his life or just for a song I don't know) Another thing I like about them is that most of their songs last about four minutes or more so you have a sufficient amount of time to soak up the notes. Out of all the bands I have heard Audioslave has some of the best music and who's song don't sound all that similar to each other. Another note I have been told that many of the guitarists from Rage Against the Machine are now in Audioslave. So if you like Rage Against The Machine you might like Audioslave and vis versa.
I'm not quite sure how to post links, but if you want to hear Audioslave just Google them on Google video.