[tOM]

i'd stick with what you've got for now and spend your time mastering cd decks and playing them with vinyl decks.

when you feel the need to start playing with three or four decks the get a 4 channel mixer

i will say though it is well worth getting fully on top of your beatmatching before trying to use 3 decks otherwise you have the potential for the musical equivilant of a terrorist attack on grand central station