Hmm...to pick up or you mean you wanna download off Kazaa? Either way....
I think most agree "It takes a nation of millions to hold us back" was their classic, tho "Fear of a black planet" got far more radio play cause of singles like "911 is a joke", "Welcome to the terrordome", "Fight the Power" and "Cant do nuthin' for ya man".
You might dig "Apocalypse 91...the enemy strikes black", has one of my favorites by them "Cant truss it", "Shut em down", "Nightrain", and "Bring the Noise" with Anthrax.
Earlier stuff like "Yo! Bum rush the show" doesnt feel like theyre in their groove yet to me, and their stuff after these albums (excpet for "Greatest Misses", the hits one) isnt as strong..."Muse Sick-N-Hour Mess Age" i only remember liking a track or two off of.
If you want names of singles lemme know, but if its albums, focus on those three and you should be straight, if youre into em.