I've got an emusic.com account, and I can tell you it's worth it just to grab up comedy albums, including two from Hannibal Buress (which are both top rate). Hannibal, Aziz Ansari, Louis CK, Patton Oswalt, Wyatt Cenac, Jen Kirkman, Donald Glover, Norm MacDonald, even Aisha Tyler all have stand-up albums there entirely worth your time. Or you can grab up volumes of George Carlin if you like.