You clearly don't know a thing about Hip-Hop if you think Eminem is "head and shoulders" above Mos Def, Jay-Z, and Nas. He is in the same class with them, but Mos Def for sure is better; Jay-Z and Nas are slightly better. This whole Eminem thing is like rating Duke in the top 5 of undergrad schools (over Dartmouth and Chicago) because Duke is a non-ivy league school, and there's a clamor to make sure everyone knows it is just as good as the Ivy league. But the commentators get over-zealous and put it two spots behind Harvard, and in the same class as Penn, MIT, and Stanford.