I highly suggest getting the Pioneer DDJ-SX as well as a Pioneer head set they work like new and i have had them for over 2 years now! This product to me is a must have for my work and give me its all every time!!
The controller gives you a great insight of what DJ'ing should mean. To me; combining loops, triggering samples in a different deck, doing a little resampling with live-set cue points and make sure the crowd goes wild with the right tracks easily found in the Serato Library. For those who are using the latest Serato (1.8), the mixing techniques for mixing in key is just marvelous with this controller. It's very intuitive. The controller features the possibility to use the beat grid for loop rolls, and you can download a free FX pack featuring some awesome FX that in fact are pretty useable, on one of the two FX decks on the upper side of the controller. The DDJ SX has also a touch-sensitive strip for searching in your track to the right point of start. This all, combined with another tap-device (as I call it) e.a. Launchpad or any other drumpad is just the right setup for an evening filled with originality and great live performances to me.
I really like this one. First I bought the DDJ-SB (long time ago) but I felt if was way to easy, and had like not enough knobs or features etc. So I saved up for a long time for this. Controllers are excellent when you don't own a lot of money! I can definitely recommend it!