Reply to NI Z1 & NI X1 Mk2 or Midi Fighter?

Hello

I used to dj using 1210s and a DJM 500 mixer, I then took after break 10 years as got bored of it all.Last weekend I bought the Z1 Mixer and loved it, playing the tunes on the iPad was great fun. But then the true fun started, I bought Traktor Pro and now want to control the effects and trigger samples in a creative way. So do I buy the X1 MK2 in a few weeks? or do I grab a Midi Fighter? Im unsure on what are the benefits and drawbacks of each.