As I dont do long trips and just wanted Music... I opted for this cheap option.
http://www.halfords.com/webapp/wcs/s...egoryId_165474
and one of these from the bay 220916478286, loaded it full of albums and im good to go........ already had a portable dvd player in back for kids... and wont get rid of my tomtom for anything... and I can move it all between cars if need be.
Would love one of them all in one fantastic ones you see on here , but it would be wasted in my car.
Good luck in whatever you choose, but look around for good deals.