Reply to Ns6 or S4????

Been making mixes for awhile now, Ive been using Virtual DJ with a Mixtrack Pro and looking to upgrade. Plus i wanna start doing some live shows at clubs and showing up with a mixtrack would be embarrassing.

I tried out the S4 and loved it at a local music store, I was pretty dead set on that but my friend told me to check out the Ns6 before anything. He said it was the best controller on the market.

Im definetly picking up a midi fighter either way so does one controller work better with a midi fighter then the other?

And what are your opinions on what controller is better?? The ns6 or the S4.