Although I wasn't particularly taken with his third album "The 3rd World" (and that's mainly due to DJ Green Lantern), his first two are on regular rotation for me. Peruvian Cocaine and Point of No Return are other top songs.
Lyrically there are very few rappers who can touch him. There are other similarly minded conscious rappers out there but they never get the recognition they truly deserve. Instead we get the latest putrid bile anal vomit on regular radio playback, where the "rappers" have nothing meaningful to say. There is nothing wrong with the Eminem's of the world (Heaven knows that we need
some commercial rappers) but why must we be forced to listen to the likes of Soulja "Crank dat (oh)" Boy.
Glad to hear that you have discovered such a fine rapper. It is hard to compare him to anyone else but there are plenty of rappers out there who rap with the same quality if not the same message. If you enjoy IT others I can recommend are Atmosphere, Talib Kwali, GZA, Killah Priest, Jedi Mind Tricks, Tech N9ne, Sage Francis, Madvillain (Doom), Raekwon, Cunninglinguists, and KRS One to name a few. Enjoy Immortal Technique in the meantime