Get a temp/%RH meter to measure the inside conditions. <50%RH is important for comfort and health. Set the fan in the "auto" mode to max the dehumidification of the a/c. What is the run cycle time like at 10:00 PM verses 5:00 PM? Nice to have a little extra capacity to be able to cool the home down in a couple when you arrive home after the a/c has been off.
Of course a/cs are grossly oversized during moderate weather or overnite. Consider when extra occupants and during the hottest weather of the year, nice to beable to to maintain your set point.
Short cycling during these peaks cooling loads is considered oversized. The downside is that the a/c does not remove as much moisture when short cycling. If you are unable to maintain <50%RH during the hotter parts of the day, have your a/c tuned to get the coil temperature <25^F below the room temp to max the moisture removed by the a/c. Next is reducing duct air leakage by duct tightening. After all of that, you have no choice but to make the a/c run cycle as longer. As previously stated, the cooling 3-4 degrees will lengthen the cooling cycle.
Reducing the size of the a/c is costly and limits your ability to handle peak cooling loads.
Any a/c that handles the peaks will short cycle during lesser cooling loads. Humidity control will be impossible during low/no cooling loads and high outdoor dew points, which green grass climates have.
If you want perfect temp/%RH control regardless the cooling loads, consider adding a small whole house dehumidifier to slightly oversized a/c as the ultimate control of temp/%RH.