What is your best recommendation for a DJ system to use in combination with this unit?

We recommend sets combining the CDJ-2000NXS2* and DJM-900NXS2.
By making a PRO DJ LINK connection through a LAN switching hub as the third or fourth player, the sequencer on this unit can be synchronized to beat timing analyzed or edited in rekordbox for performance.
*We recommend updating the CDJ-2000NXS2 to the latest firmware before connecting.