i owned both the S2 and the S4, and currently have the DDJ-sx
i love the ddj-sx to bits but i really wish sometimes its made for traktor
as much as i love the ddj-sx sometimes i thought if it was best if i got a traktor specific controller, seeing that now i use the ddj-sx with traktor most of the time and not really enjoying it
i love the ddj-sx in serato, everything works as it should, great 1:1 mapping and great jogwheels
haha if a ddj tx comes out get that for sure, but i havent heard about that coming out anytime soon .. honestly the first thing you need to do is decide if you want to use traktor or serato and then go from there, if your gonna use serato i would get the pioneer ddj sx or ns6 maybe, if your gonna use traktor go for the s4 or numark 4 trak, and i would say traktor is better for house / dubstep , while serato is a little better for hip hop, thats just my opinion, a lot of people would say otherwise
with native instruments releasing their own gear/hardware its highly unlikely that the DDJ-TX or any traktor equivalent of the ddj sx will ever come out
If you like Serato you could always get a VCI-400 with Serato DJ which is being released soon. It’s half decent with Intro. Or the S4 Traktor. The SX looks so nice but is huge.
I personally use a controller because it saves space because I don’t have the room to have to turntables/cdj and a mixer and is easy to transport. You’ll definitely want a flight case for the SX or not take it places very often.