What deck should i get to learn trance DJing?

I want to dj trance/house/dubstep on the weekends...it's on my bucket
list haha. If I'm just starting out, what deck do you suggest I buy?
Also, should I get one with the I/O built in, or buy a separate I/O
and pay less money for the deck? Do I need to buy any special software
(like Ableton, etc)

ANY help at all would be greatly appreciated!!