Thank you for your reply.
Last week I bought the Navigon 8410, but I can still return it. I run the 30 day evaluation version of PocketFMS on it. Next week I will be flying.
The discussion came up , as a friend of mine was telling about the Ipad and its possibilities. Personnaly I think the Ipad is a nice piece of kit, but could be rather large in the cockpit. The advantage of the car nav is that you can mount it near your instruments (and you don't need to look down on your knee).
On the other hand I could utilize the Ipad for other means.
As I fly from Eindhoven, which is near the German and Belgium border, it could be very practical to have actual data of the countries.
It just want to hear the opinion of others, before making up my mind.