_best_ - Rekordbox 560 Exclusive
Furthermore, newer CDJ hardware (like the CDJ-3000 or Opus-Quad) requires features found in Rekordbox 6 (like 64-bit analysis for FLAC). If you use modern players, you need modern software. But if you spin on CDJ-2000 Nexus or XDJ-1000MK2 units, 5.6.0 is the gold standard.
Many DJs searching for this term are actually looking for the (a rumored unit that never officially launched) or the DDJ-800 which costs roughly $560 on the used market. rekordbox 560 exclusive