I have a 2004 Acura TSX with navigation and i want to connect my ipod, help?

I have navgation and the 6 cd changer so there isnt much space. Im sick of making cds and im looking for the best option to connect my ipod and there is no way im using the fm transmitter. They suck. I dont know if its getting a in dash deck or what but if you have any suggestions that would be great. Thank You!|||The only way you can connect is with an FM transmitter or a cassette insert.|||you might need a trunk mount CD changer