change of plans

Hey a week or two ago I was askin all bout speaker and h/u setups. Ive decided im gonna spend my money elsewhere. But I still need a head unit. Being that the car has 6 speakers in it, is there anything special I need to look for in a head unit?
thanks.
 
Will the new head unit power the speakers, or are you planning to tie into the existing amps? You shouldn't have any trouble if you get the wiring harness adapter (from Crutchfield, or BB or CC) and then use existing amps/speakers. Head unit won't matter unless amps are on-board.