I am leaning towards 4 of the GR-1 motors. In testing with the motors I have at the minute they were drawing 0.5A each when unloaded which is normal but spiking to 3A each when loaded.
The GR-1 motors say the stall current is 70A, does that mean I need an ESC that can take peaks of 70A?
As far as I am aware you match the ESC to the loaded draw current of the motor, and then get a more powerful ESC if you are being more conservative with your design...