Thanks for all the help. Let me clarify my purpose for the different platforms.
I'm a low time pilot and wish to use a gps device as a backup for the old fasioned navigation. As the netherlands is quite flat, there is no need to fly high. Second, the platform can help me plan the flight (notams en weather). Next, the device can help me stay out of airspace, i'm not supposed to be in.
I still have to make op my mind.