Reply to BEHRINGER NOX606 HELP PLS!! Is this a feasible setup with a NOX606?

Hi, I currently use a MacBook Pro with RekordBox, 2x CDJ 2000s (all connected via Ethernet hub), a Behringer NOX606 & a pair of KRK 5s. However, I am looking to switch to USB & also to add Traktor & Traktor Controller X1 (to primarily use for its FX features, as i'd ideally still like to use my CDJs as Midi-Controllers) to my setup. My 2 questions are: 1. Is this a possible setup? (MacBook Pro with Traktor, 2x CDJ 2000s, Behringer NOX606 mixer, X1 Kontroller) 1. Would I need an external soundcard with this setup? Bearing in mind I still want to continue using both CDJs running through different channels in my mixer? Many Thanks in advance