Do you REALLY need moving head lights?
If it's just to throw beams onto the dancefloor, then think more about moonflower type lights or scans... they'll be cheaper for better quality units and less hassle to program and run.
If you can find them (as I think they're discontinued now) get some Martin Wizard Extremes. They were pretty bright, threw beams over a huge area and could be run stand-alone in a sort of Master/Slaves mode so you could ignore them and get on with DJing.
I'm sure having moving heads is fashionable... but is it practical or even really necessary?
Will you ever use their ability to pan 360+ degrees or tilt 270?
If they're going to live on stands at one side of the dancefloor... no. Not really...
Also ask yourself if you'll have time while djing to run a DMX console and your laser software while still thinking about your next mix/tune...
In most situations I detest lighting that runs itself... but when solo DJing, it has it's place... and it's generally a lot cheaper than DMX controlled stuff...
But if your totally sold on the idea of moving heads, I strongly recommend you budget in the region of $1000 per head and $2500 minimum for a decent DMX console. You will very quickly regret it otherwise!
There's a reason FleaBay is full of the sub $1000 kit selling for peanuts...