Traktor Hardware for begginers?

Hi



I´m taking the TRAKTOR PRO COURSE. I´m a beginner.



Could you recommend me a Hardware for Traktor Pro.





I have the " APC AKAI 40 " Do you think is enough for Traktor Pro. Sometimes I have troubles with mapping. Do you think I need to buy another controller?



I was thinking buy:



Kontrol S2 or Kontrol S4 (I´m a begginner 4decks are necessary, Is it a good investment for the future? )



and What about Traktor Kontrol X1, can this hardware supply the Kontrol S2 or S4 ?





Is there another Dj controller can you could recommend me, I will appreciate it so much.





I´m a beginner but I want to have a hardware to make me easy my learning process.

(work flow)



Thanks