A classic - easy to use DJ effects makes the Pioneer DJM-600S a fave with DJs to this day. It's not got the cleanest sound though.
Denon introduced the first input matrix system on the DN-X1500 to route any input to any or as many channels. It also features cool effects and high quality audio.
The Ecler Nuo-4 has a fifth MIDI channel and aux input for DJ software. It also has kill EQ and scratch friendly crossfader control.
The Allen & Heath Xone:62 has effects routing, great twin filters and awesome sound quality. One for clubs and adventurous bedroom DJs.
The iKey is the missing link between your DJ mixer and a flash memory stick. It will convert the audio and record it as Wav or MP3 to any USB device, including iPods!
The DJM-909 has two individual effects units (one per channel) controlled by a touch-sensitive illuminated screen. It offers the coolest effects around.
The Urei 1601S has the most advanced on-board sampler of any mixer with automatic pitch control of looped samples. It could do with more filter types though.
The PMC-08 Pro is loaded with connections, featuring two advanced effects loops. It also has outstanding sound from two EQ modes, plus a smooth adjustable crossfader.
Ableton Live 5 has an intuitive and fun interface with serious sound manipulation power for DJs and live electronic performers. Produce and DJ with one application.
The DJ Console Mk2 is great value for money with software and a hardware controller. The interface has a soundcard and features MIDI control for use with other software.