Hey there! This August I'm going to L.A. & San Fran. + some other places on the west coast of the US and I'll be needing a decent navi app for my iPhone 4 and my iPad 3.gen, because we will be spending a lot of time on the road. In Europe I'm used to Navigon, but I'm not sure of the map-quality of the US version? Is Navigon the obvious choice for me or is there better alternatives? I'm thinking TomTom or Garmin, but what else is there? Let me know! Thanks in advance!