hello.. i wanted to add a aftermarket dvd player to stock nav in my is350 no ML... but i was adviced that for future expansion an aftermarket headunit would be better...?

quesion is.. if i pop the PANASONIC CN-NVD905U into the center console and remove the stock navi... how would integrated phone / gps backup camera work? would they all still be integrated? and cd changer?

anyone have an advice to this?