I saw Del live a couple years ago when he came to Buffalo. It was one of the sickest shows I've ever seen. He's easily one of the best MCs/lyicists ever, aside from MF Doom, Aesop Rock, Rakim, and a whole bunch I'm not naming.
Here's a couple songs off the Deltron 3030 album, one of my favorites. I used to rock it constantly, but I haven't listened to it in a while.