buying a mixer and pro cds players is dependent on what your willing to spend what you want plan to use them for.
Stanton, Numark, American DJ all make "entry" level and top end equipment. Denon and Pioneer lean to the more expensive. It's one of the cases where there aren't that many manufacturers and most music store employee's are clueless when it comes to selling DJ equipment.
The more expensive equipment gets you optical outputs, the ablility to scratch a cd as if where a record, loads of special effects such as creating loops, play mp3 discs, etc. Mixers can be basic, two channel units for crossfading or turntablism. Obviously, more channels provides more input sources. My mixer has the capability of eqing out the high, middle or low end, important for mixing where you want to mute the bass line of one song for crossfading purposes.
So what do you want from the setup...
