] and then decide for yourself. It's now very easy for novices to convert and reconvert using the sd method. Heed the advice about NV backup and you won't risk anything. If unhappy you can always come back to 3790. Apart from the 34xx features already mentioned, such as Guidance 3 navigation, there's Android Smartphone link, and you can enable extras such as Video & mp3 players, so you may wish to read this thread also: [Only registered and activated users can see links. ].