Reply to Switching to DVS. Z2 or S4?

I already own the S4 and am going to start playing DVS. I just really miss playing vinyl. Should I get the Scratch upgrade for the S4 or sell the S4 and buy a Z2? Other is also a possibility. I don't scratch and play mainly on 2 decks with minimal effects. Though i like to cue a third tune in the 3rd deck in the mix. I play drum and bass, footwork and juke.