The pressure limit for residential plumbing is 80 psi. For the majority of applications, 60 psi is usually more than sufficient.
The pressure tanks will offer a measure of relief for the well pump, and they will also permit a little more reserve in the event I have a standby generator failure during a power outage.
Each 119 gallon tank will provide approx 30 gallons of drawdown. Since some water will be commonly drawn off for general use after the pump has filled the tanks, there is no predicting how much water the tank(s) will continue to provide during a power outage. If 58 gallons had been previously drawn off, that will leave only about 2 gallons remaining before the pump becomes activated. If power is lost at that point, then two 119 gallon pressure tanks may only provide 3-5 gallons (in consideration of the usual 2 psi lower pre-charge margin below the pressure switch cut in pressure).
I just dispensed 1.63 GPM from the kitchen faucet and 2.13 GPM from a first-floor shower.
Depending on which aerator is installed on the kitchen faucet, and the capacity of the shower head (usual max flow = 2.5 GPM), those flow rates maybe entirely reasonable.
Some devices utilize flow restrictors that are designed to further reduce the flow rate as pressure increases, so as to maintain an equal flow rate across a wide pressure range.
The pressure delivered to your home is governed by the capability of your well pump, the level of water within the well and the pressure switch settings. A larger pressure tank alone will not increase pressure, but will only reduce the frequency of pump cycling. The appropriate pressure tank size will result in the pump running for 60-120 seconds (120 seconds preferred) once the pump becomes activated and there is no further flow to faucets/appliances.
With 60 gallons drawdown, the supply pressure will be either dropping while that 60 gallons is being drawn from the pressure tanks, or the supply pressure will be increasing once the pump becomes activated and is replacing the water drawn off from the tanks.
A much better option will be to equip your system with a Cycle Stop Valve. A CSV will prevent the pump from cycling anytime more than 1 GPM is flowing to fixtures. Because the CSV is preventing cycling, a much smaller pressure tank maybe utilized, typically as small as a 4.5 gallon size for a single family residence.
When equipped with a 4.5 gallon tank and 60/80 pressure switch, using only ~1 gallon of water will cause the pump to become activated, which will then result in 70 psi being continually supplied to home fixtures for as long as water continues to be utilized. Once water is no longer needed, the pump will continue to operate for an additional 30+ seconds to continue to refill the pressure tank's remaining capacity up to the 80 psi shut-off pressure.