The CDJ-2000NXS2 is the latest version of Pioneer's DJ flaghsip media player. Boosting a high-resolution touchscreen, 4 hotcue buttons, a new matte finish and more features you can probably use in a lifetime, the CDJ-2000NXS2 is the most complete DJ media player on the market.
The XDJ-1000MK2 is the upgraded version of the XDJ-1000 and has been fitted with a better screen (from the CDJ-2000NXS2), support for high-quality audio, better sound, and more. It's not a world of difference compared to the XDJ-1000, but if you were thinking about getting the original model, going for the mk2 version for a slightly higher price is certainly worth the money!
dThe Pioneer DJ XDJ-RX is a media player that works seamlessly with Pioneer's Rekordbox music preparation software. The player supports USB sticks an has no CD players. It can also function as a midi dj controller to DJ software such as Rekordbox DJ.