i want to buy the nokia 5800 navigation edition cellphone because i like the GPS and navigation features the most. I am currently living in costa rica and i noticed that there are no A-GPS for this country, that is, there are no ovi maps for this country....so does this mean that if i buy the phone, i wont have the navigation features? do i have to buy an special map? are there even maps for COSTA RICA? if this feature isnt for costa rica, would i loose my money? should i buy the cheaper "xpress music" edition?