1.7A and 1.5ohms means the power consumption is 4.3W (when stationary). However stepper power consumption doesn't increase massively with speed and load, so lets budget 10W per motor. So 30W overall will be plenty.
Thus 24V 1.5A supply should work.
Stepper drivers are power converters, the current in the motors bears no relation to the current pulled from the supply.
However the 3.2 ohm measurement suggests the motor you have is actually the 1.2A 3.2ohm model, which is 4.6W consumption - basically the same power, so same applies.
If only 1.2A an A4988 will work, but DRV8825 modules are a bit more robust and efficient, I'd use DRV8825's.
24V is a good choice of voltage for general use - higher voltage allows faster speeds from the motors, but also higher losses. If you only need low speed a 12V 2.5A supply would be an option.