Official comment
DJs ask me all the time what gear I recommend, and I always say the same thing - buy the best gear you can afford for the need you have right now. If you don't need it now and can wait, then wait. Don't have buyer's remorse because something else just came out because that will always happen; there's always a newer product around the corner.
Your CDJ-2000NXS2's will still be fantastic for years to come.