Nice or Amalfi Coast?

We'd be visiting Europe later this year with Amsterdam (3 nights), then take a flight to Verona (Italy) and spend 1 night, then Venice (2 nights), Bologna (1 night), Florence (4 nights) and Rome (2 nights) and take a flight back home from Rome.

Me and my wife visited Amsterdam, Rome and Florence last year as well and this time my brother and his wife will be accompanying us.

We were thinking of adding 2-3 days more to this itinerary and see a new place, preferably something with a beach.

Nice and Amalfi Coast (Positano, Sorrento) are looking good options. Which one would you pick? (We are okay with additional flights)