yeah wu-tang clan u got a quality starting point. start with the 36 chambers plenty of classics on that album then u'll start to appreciate the artists as solo artists Gza's liquid swords, Reakwons Only built for cuban linx, Method mans Tical, theres loads more but they're my favourites. theres so much material by them.
try just downloadin tracks from kazaa or limewire or something from random artists and see who you like the sound of then go out and cop they're album. that's usually what i d when im getting sick of the cd's in my collection