I got a Garmin 478. It's got all north american streets in automotive mode and all coastal waters in marine mode with turn by turn guidance in highway mode. I must say that none of the units will be 100% accurate. Either maps need to be updated, or places that look like intersections on maps really are not. I paid $720 for the unit I bought though. Garmin, Lowrance have streets only units and I don't think you could go wrong with either. Go to a retailer and look at features. Check them out and buy what best suits you.