I agree completely re windoze (or the products running under it, one can never tell) being too unstable for serious usage.
It's just that
a) Dedicated aviation GPSs tend to be rather limited functionally, and
b) Some people want to do other things with the unit, e.g. run windoze-based flight planning software on it, or get internet access for weather etc.
I think far and away the best aviation GPS is the new Avmap EKP IV (about £1050 from Harry M) - the only real drawback is that there is as yet no Navbox interface for it for route download.
I have just bought the Motion LS800 tablet, so watch this space
