One of my favorite rap groups growing up was Gang Starr and Keithy E aka Guru was the MC alongside DJ Premier. Sadly, it seems as though Keith has passed away after a year long battle with cancer. His Jazzmatazz records were always underappreciated by the masses and Gang Starr has had some absolute classic material that seems like it could fall by the wayside because of their lack of crossover success. This isn't to say they were strictly underground but they never really blew up like I thought they would. One song that definitely is sliding into oblivion is "Check the Technique" even though I think it is the epitome of hip hop. Tight rhymes driven by a simple beat. The world has lost one of the best MC's ever.