Start from your week, not from the map. Where you work, where kids would go to school, whether you want to walk to dinner or drive to a golf course, how you feel about towers versus trees. Miami's neighborhoods are unusually distinct, and the right answer falls out of those constraints faster than people expect.
A rough sorting: Brickell and Edgewater for vertical, walkable urban life. Coral Gables and Coconut Grove for canopy, schools, and houses. Miami Beach and Sunny Isles for the ocean itself. Doral for newer family communities. Aventura for amenity-rich condo living between the two counties. Fort Lauderdale for boating and a calmer coastal pace.
Then test the shortlist in person at the right hours, weekday rush, weekend night, because neighborhoods change character by clock. Rangely runs exactly this exercise with relocating and local buyers, in English or Spanish, and the map search at rangelyadames.com plus the Rangely Adames iOS app let you watch real inventory in each candidate area while you decide.