I have been using 2 garmins in Thailand, car & motorbike for a number of years. The reason I bought Garmin originally was the cost of 'official' maps and was looking at independant maps which would also a lot easier to update with a one off payment. Things have probably changed now. So, if I may suggest. Don't start off with the brand for Thailand but start off with what maps are available and then go for a machine which fits, whatever brand.