Unless there is a need for a high pass filter, using a larger coupling cap won't hurt. Something that's often forgotten is the series reactance of a cap is a noise source, just like a series resistance. So if your coupling cap is 3dB down at 50Hz working into , say, 1K ohm, it has a noise contribution at 50HZ same as a 1K resistor. Even at 500Hz, it contributes as much noise as a 100 ohm resistor. In a mic, there is a tradeoff between noise and the need to high pass filter thumps and plosives.
The noise audibility is reduced by the Fletcher-Munson effect, but it's still there on spectral plots of many mics. I use larger caps than most engineers, because I think I can hear that LF noise.
