Ok here's the deal: I have a 98 sc300 with the pioneer premium sound system with the 12 disck cd changer. I want to get rid of the factory head unit and get better bass. The factory head unit is double-din correct? If so, can't i just buy one of the kenwood or sony double din head units? No one seems to have one of these and i was just wondering why? Do they mount nicely? Also, these head units supposedly will plug into "compatible cd changers", will they work with mine? Any recommendations on head units, subwoofers, setup, etc is more than welcome. Thank you in advance.