I think you are on the right track. The Z2 is a fantastic mixer and great value now that the price has been slashed to $600 (probably means something new is coming). As you said, you can use it to mix your regular records and then when you get ready, DVS is right there ready to go. I’m not a turntablist so I don’t know how the RP4000 compares to a Tech 12xx, but Reloop as a brand has been very good. I know people really love the RP7000 & 8000. If you like Traktor, I say do it.