I have a Vestax PMC-37Pro. It is one of the newest Vestax mixers. There is input matrix system (one source can be assigned to 3 channels, each channel with different eq and/or efx). This is really revolutionary. And istead of knob eq control you have sliders with minus infinity.

I had the chance to check Allen and Heath Zone 64 but in my opinion these mixers are perfect for studio or radio (I suppose Groovetech is using them).

Anyway, on parties I usually have to play on Pioneer DJM500/600 and it is quite good mixer, even if the sound is a bit crappy and efx are often overused by many DJs.