In the end all green grass climates need air flow that gets you to <50%rH in the home. If you run the stat at 75^F, 50%RH is a 55^F dew point. To provide a 55^F dew point you need a 45-48^F coil temperature. Measuring air flow is difficult has to many variables. With the home at your desire temp and outside at typical cooling temps, slow the air flow until you get a 45^F coil temp. Then check for sweating spots on the supply and insulate with close cell rubetex.
This will get you a comfortable home. For low/no cooling loads and high outdoor dew points, add a small whole house dehumidifier. Also consider the filtered fresh air ventilating option like the Ultra-Aire has for when the home is occupied. This will purge indoor pollutants and renew oxygen.
Bear Rules: Keep our home <50% RH summer, controls mites/mold and very comfortable.
Provide 60-100 cfm of fresh air when occupied to purge indoor pollutants and keep window dry during cold weather. T-stat setup/setback +8 hrs. saves energy
Use +Merv 10 air filter. -Don't forget the "Golden Rule"