Reply to Good mixer to sit between two X1s?

I'll soon be getting the X1's for this set, and using a mixtrack as the mixer, but that's only temporary.

What is a good Mixer, that doesn't cost like 3 grand, doesn't have to be a djm, something just good and hopefully isn't too expensive. If you suggest something, please say why! I use Traktor. And mix mostly electronic music.

Preferably 4 channel, so this can last me a long time.
(If there is another thread for this, I must have missed it, link me! sorry in advance).