You can have any option you want, it's your car. Just to say that I have had a Tomtom Go910 since they came out many years ago. It has a 20GB harddrive, can play mp4 movies and mp3 tracks through the car speakers. There are non-slip mats that take the satnav mounts that you can put on the dash in your line of sight. Later models do have voice recognition. Only thing they don't have is the larger screen away from line of sight. Agreed the trailing cable is undesirable.
I take it your reply was directed at me Marnie? I wasn't referring to the TomTom I was referring to the CMS which you said "One can do all those things with the standard CMS and save yourself £1700 if you have a Tomtom" When clearly the CMS can't do all those things.
I'm curious how the mp3 works through the car speakers? I take it, its via bluetooth? In which case how does the phone work with this if its paired to the car?
£1700 for Nav alone is dear but like has been said you get a lot more than just Nav, like voice control, larger screen, hard drive, DVD over the standard Nav. Are those features worth an extra £1000? I doubt it. But dealer discount, integration, instantly there with no setting up brings that price more bearable for me.