Yeah old SP was fun- hard to listen too as they were quite experimental for the time but very insightful use of synthesizers. I also like the old New Order stuff back when they were Joy Division. KMFDM had the best lyrics and overall package and made use of samples quite a bit on their old stuff. BUT my favorite is Wumpscut that one man show Rudy had some harsh industrial grade cuts. Sad that he gave it up after admit he could not make a living out of music.