You wont find any better/cheaper moving heads with DMX then these ANYWHERE.....this auction if for 2 of them and its ~$350 w/ Free shipping...
http://cgi.ebay.com/2X-Qspot-15W-LED...item3361527181
In this video you can see I used 4 of this same exact moving head.
http://www.youtube.com/watch?v=CXNEM...eature=related
http://www.youtube.com/watch?v=v4QuS...eature=related
If this is to expensive for you then you wont be able to afford DMX moving heads.