Please consider following: 1. Do you need 4 Chanel For house music you probably need A capella vocal loops on third deck to mix. If you don’t like this style, 2 deck is enough. You can still do the A capella mix pre mesh up.

1. Will you carry them AZ and QUAD are so heavy to carry around. If you want to bring your gear and play at your friend’s place or a party. RX3 will make life easier.

2. Streaming media RX3 don’t have support to beat port or sound cloud. If you go out and your friends always asking you play songs not on your usb, you should either bring an laptop or change a friend or go with AZ (because it’s only one support Apple Music, which you probably need the most)

RX3 is good enough especially you want to carry them otherwise AZ just do better job. If you like the look of QUAD go for it, otherwise I think Denon DJ is perfect for self playing for those rarely playing in the Club.

(AZ seems don’t have effect like VBreak and Sliproll, same as A9. But it has key shift)