Reply to Why do I need and S4? S2 is good enuf.

I'm ready to take the next step and get a controller. I currently use 1200's (no time code) and a Denon dual cd player nothing fancy. I like club/house/hip-hop/dubstep. Basic mixing with the cross-fader beat matching with my ear. Anyways I want to take my djing to the next level using samples, hot-ques, loops, rolls, effects etc... I want to create some signature stuff.

I was looking at a Numark NS6 then decided Tracktor and the S4 was the way to go. Then the S2 came out and the price seems just right.

So before I make my final decision I'd like to hear some opinions on why I should get an S4 vs. an S2.