Reply to Looking for some advice

It being a while since I write anything but I'm always in here doing some reading and learning from every one that ask or answer any question. Well I had being hooked to NI, it is all I have and all I use so far since I desire to invest money in DJ gear . Here is my list about what I have: I own the Kontrol S4, Two F1 and Mikro Maschine. I use a Sony Vaio with Traktor scratch Pro 2. I do have Ableton software 9 also but have not get into learning much about how to use it. I'm looking for advise here, I have to send my Kontrol S4 to be fix So I would like to take this opportunity to either test out or branch out to other software and DJ gear . I consider the idea of getting a Mixer so I can move out from the all in one controller. I also thought about getting a different software and all in one controller such as the Numar NS7fx or the DDJ SX just to mention a bit of what I was believeing. So let me know what you believe so I can use it to make a decision. By the way when I say a mixer I mean a 4 deck mixer that inter act with traktor or other software that is consider stable and well known. Thank you.