Reply to Machine & Midi Keyboard?

Hey fellow DJ's got a question? Who out there isusing Maschine and a midi keyboard and what brand? I'm have trouble deciding on wanting to get a Roland X8 keyboard or just a simple midi keyboard? Here is my set up: Berhringer djm-4000, (2) CDJ-100mkIII, Maschine, Kontrol X1, all running on Traktor Pro Scratch, & I will be getting the S4 This weekend, I also have a Akai MPS 5000 that i'm not really using that much but I like to make my own beats in which I can do that on my Maschine as well... so i believe i'm going to sell my Akai MPC 5000 to get some other gear , Midi Keyboard? Help

Thanks to All my fellow DJ's and keep Spinning,Mixing & keeping people dancing!!!!!!!!!

DJ Panic