Reply to What is best?!

So this how it is,

I've been involved in deejaying for about 3 years now and it is now that I realize I wanted to take it seriously. The last two years I've been doing massive research about what to get, whats the most trusted brand, whats best for me, etc., and had late evening discussions with some of my friends that know about this industry in a more professional level. I had use CDJ's/DJM 2000 borrowed from some of my friends before and they always work perfectly for me as well as some of their MIDI controllers. The first controller I bought (and still have) was the Numark Mixtrack Pro and surprisingly it has work great for the small parties, but now I want something a little more professional club-wise. Its very obvious that Pioneer is the industry standard DJ brand for most of the clubs out there and their controllers are definitely not bad, but from the research I've done it is very true when people say that they are basically new at the "MIDI controller market" and there are very strong competitors that where there before.

As my friends say "If your gonna take deejaying seriously, you might as well just buy the industry standard (CDJ's/DJM's)", the thing is that (from my experience) the only clubs that work that way are the big ones that are 21+ but I'm still not 21 so that rule STILL doesn't apply for me (correct me if I'm wrong), so right now a MIDI controller is what's best (for now). The ones that I have my eye on are Pioneer DDJ-S1/T1, Kontrol S4 and Xone: DX. Software is not a problem for me I've use Serato ITCH and Traktor and for me they both work well, the only prop I give Traktor over Serato ITCH is that (correct me if I'm wrong) you can't use ITCH with any other controller besides the one it came with and with Traktor you can map it with anything you want even CDJ's if I even decide to use it in the future. And people tell me "well if you use ITCH and move to CDJ's change to SSL" but the thing is that then I will have to spend about $600 in a Sertao Box in order for me to use it, when I can just buy Traktor and use it with both my CDJ's and my controller. With Traktor is a 1 time investment and I really like that.

What I'm trying to say is that besides the software and the layout (big or small, etc.) what would be the best investment to make that will open my doors to a more professional level in the "DJ world"? I can go with the Pioneer controllers and get used to the industry standard layout, but don't have the best in/out-puts or I can go with the S4 or the DX but maybe in the future people (club owners, etc.) don't take me seriously because they believe what I have is a DJ toy. I need your help, and sorry for the long post.

P.S = Even if I buy a Serato ITCH controller I will still buy Traktor Pro 2 to map it with. (Ex. Xone: DX)