DJ
I dabble in DJ'ing too, using a laptop and USB mixer, mostly a Hercules MK2 and a Behringer BCD 2000. I have a full lighting rig, smoke machine and PA for "House Parties" so if you are having one....Call me...
I use Virtual DJ, Tracktor and Ableton live for mixing the tracks, as you can beat match very easliy, which makes the job a whole lot easer. You can get free trials on all of this software:
Virtual DJ (Link) is the best.
