Does anyone have any experience with either of these map products for Garmin GPS? I'm planning on buying several GPS units for myself and some friends and the prices in the US are about 50% of what they are from a Garmin dealer in Thailand. I've done a lot of research and understand what mapping software is available for the hardware I'm planning on buying (Garmin 276c). But, I desparately trying to get some feedback on which is the best of the mapping software products as I'll have to buy it separately and it's not cheap. From what I know, the available options are: Garmin Mapsource Worldmap - B3000 Garmin Mapsource Thailand City Select - B10,500 ESRI - someone told me B12,000 but this is not confirmed. I would reward the purveyor of this information with buckets of mead here in Chiang Mai.