Reply to Yet another DDJ-SX or TRAKTOR S4?

Im trying to decide between 2 controllers but since ive never dj'd, what do you believe between the 2?
http://www.pioneerdjusa.com/gear.aspx?product=DDJ-SX
http://www.native-instruments.com/#/...-s4/?page=1808

I like the pads on the pioneer, but for the size and portability maybe it would be better to go with s4 and a midi fighter or something on the side?