Hi Mauris, the decision on the Colorado was made after looking at the possibilities for future expansions of Garmins maps to include a 3D map of Thailand. I guess the 3D view really sold me. it looks like Google Earth, which is where I plan my trips. I am a photographer (retired) so am very visually orientated and the 3D view gives a very clear idea of the lay of the land.mauris wrote: The decision has been made. Well done. What made you decide to buy Colorado400?