Sorry to lure you here under false pretences chaps but I think this is the best was to prove that not all rap is what your preconceptions make it out to be (though admittedly the mainstream rubbish is still exactly what you think it is).
http://www.youtube.com/watch#!v=Lsgbb23z27w&feature=channel
http://www.youtube.com/watch?v=J8qfvtUBhiQ
http://www.youtube.com/watch?v=kPCcf4XNeOg
http://www.youtube.com/watch#!v=Lsgbb23z27w&feature=channel
http://www.youtube.com/watch?v=J8qfvtUBhiQ
http://www.youtube.com/watch?v=kPCcf4XNeOg