Get what makes you happy.
I have your setup. rmx1k, djm900nxs and 2 cdj2knxs. I also have a sl4 to video and currently moving into rekordbox to I wont need to use laptop.
I play a wide range of music that I personally enjoy, I also have a business. My equipment looks "professional" when I play at formals, etc.
I am happy with the decision I've made. I do have ableton live, maschine and had the apc 40. I tried those setups...If your doing a wedding or a serious gig with lots of money involved, using those equipments will make you look like a noob.
But if you get some real sh!t,get the cdjs.
Dont get me wrong, I've met and heard people using laptops only, ableton live and etc. But honestly, I wont talk about "whats ifs", I will tell you how i use my system which you are 2 cdjs away from.
I use rekordbox with two 500 usb g drives from hitachi on each player with the same music library, 2 16gb flash drives with specific playlists, and 2 16 sd cards. As I mentioned, I currently dont use serato but only for video (after Serato finishes the HID for the nxs). If my hard drives were to go out, I can go on my sd cards, vice versa but chances of that happening are slim compared to IF your laptop were going to crash and than using your cdjs as a backup. My cdjs is my backup when I plan to use serato fyi. I also have my phone i can plug into a channel to play music if my cdjs go out.
Lets also not mentioned that wifi they have.
Now, creativity? You can be creative on any styles or setup god drops in front of you so do not base your decision on "creativity".
cdjs are expensive but...so are GOOD laptops.
Get what makes you happy.