Hi, I'm looking to do a road trip across Vietnam and as a result, am looking at building into my bike a specific GPS unit. I've heard so many people use Google Maps, however, I think it would be safer to build in a specific unit. The mechanical aspect of how to do this are not difficult, however what is difficult is what model to choose and where to buy it from. Do I buy the USA or a UK model, both cover Vietnam from a country-specific basis, but is there any difference in the models themselves? I've looked across the internet at a few reviews and a couple of the slightly better review are here and here, however, most seem not to go into detail about the differences between the UK and USA range. The other option is to buy a locally made GPS unit, however, I’m looking at Vietnam and wondering whether they have a massive “fake” problem and then wondering if I would ever get any use out of it if I took it home.