2003/2004 - 6cd dies - $650 fix (I fix them),radio unit dies - takes out HVAC system . its a simple but time consuming fix. door locks die($350ish), window motors die ($500ish)
05/06 - yep to replace anything in one of those.
since you have the plain jane approach it takes out the navi and tv systems. if you can find one with the radio swapped out you solve the radio issue. the locks/window are a consumable item that dies with age.