FIRST PURCHASE ADVICE: DDJ-SX vs Traktor S4 MK2

[foolyouswear]

I'm planning to purchase my first controller after messing around on my friend's S4 a handful of times and watching many-many-many Youtube videos and tutorials on mixing. Though I'm pretty much a noob, I learn fast and want something that I won't need to replace for awhile. Narrowed it down to the DDJ-SX and S4, but now I'm not sure which I should pick. I will be mixing mainly EDM and hip hop (no scratching). The difference I understand so far between the two:

• DDJ-SX = metal & bigger, S4 = plastic-y & smaller
• DDJ-SX can run multiple kinds of DJ software, S4 can only run Traktor
• DDJ-SX = more cue buttons

Is there any reason I should pick one over the other? Any help/feedback would be greatly appreciated!

[Rip van Winkle]

-The S4 can run on other software but has the tightest integration with traktor on the market
-The DDJ-SX is a pain to drag around because of its size and weight
-And you only really need one cue point per deck. having said that. I believe the S4 has the same amount of hotcues depending on how you lay it out

Seems expensive for a first controller, I get that you would want every option available but you shure you don't want to try out on something a little cheaper? the big advantage of Midi is the ability to create setups that meet special personal requirements and for starting out/trying out the hobby most cheaper controllers will also suffice