Run The Jewels - 2100 (Feat. BOOTS)
If you dig this tune check out:
Killer Mike, El-P, Sammus, Open Mike Eagle, Homeboy Sandman, Danger Doom, MF Doom, Madvillian, and Rage Against The Machine
(all links go to youtube videos that stand as the best representation of the artist so you don't have to go hunting for music that doesn't suck)