sam ash, guitar center? i was even at best buy the other day and they had like 4 different setups of cdjs and mixers and computer software and monitors all setup and ready to go to be played around with. cant remember which best buy it was though, i think it was either south beach or kendall.

i think grooveman and uncle sams might sell some shit too but its probably limited and retardedly overpriced.

your best bet is to call these places up and ask what they have before you make a trip over there.