And the reason we do want the current to rise as fast as possible, its because we run them at frequency, and current needs to rise fast at a good preset value before dropping out again. Its about the power. The flux is proportional to this current, so no current = no power transferred to rotor. And if the current doesnt rise high enough before the driver needs to reverse it, the overal power in the rotor goes down. So this is why the coil resistance needs to be much lower than one of a dc motor. As low as possible. This is the same thing with saying that we run the motor at a much higher voltage than labeled. Because current is v/r, it grows for this relation, if voltage gets higher or resistance gets lower is same thing, the current doesnt care much.
I would choose the ones with lowest coil resistance, and which for 12v have a max current (the labelled one) that is higher than my intention for the setting, because that is how they will run. Also, as a side note, its sort of ac, so instead of resistance would be more correct to talk about impedance instead, sort of R+s*L, but thats just unnecessary complication and we can technically ignore coil impedance for this purpose.
I would choose the ones with lowest coil resistance, and which for 12v have a max current (the labelled one) that is higher than my intention for the setting, because that is how they will run. Also, as a side note, its sort of ac, so instead of resistance would be more correct to talk about impedance instead, sort of R+s*L, but thats just unnecessary complication and we can technically ignore coil impedance for this purpose.