I have played on the XDJ-XZ and it's awesome! A large presence and great functionality, but your set up is with 2 displays and modular, so that's the thing you need to determine if the upgrade is worth it. If not you're still fine. Are you on sticks or rekordbox, because with the XDJ-XZ you would open up to using Serato DJ Pro! The other benefits are personal to what you do as a DJ (2 x 3 band mics/3 band master EQ/6 x color effects/recording the master output from a stick or software combined).