Reply to Need Opinions about New Upgrade.

Hey Guys, I am new to the Forums.
I am a Junior in Highschool with DJs as a Hobby.
I have already done several shows, but am planning to upgrade my novice gear.
At the moment, all I have is a Hercules DJ Control Mp3 e2.

For the past year I have managed to save up around $1,500.
With this money I am wanting yo be able to run and do gigs on my own, a MIDI Mixer and a couple of PA Speakers for starts.

Since I will probably be doing mostly mobile, I am not interested turntables. As far as MIDI Mixers go, I am either looking into the Traktor S4, Pioneer DDJ-T1, or the Numark NS6.

Which do you believe would be the best controller? I usually mix all types of music, but I am most fond of Dubstep. Thanks for reading, and thanks for all the help