I don’t want to wire them for 12ohm & find out later I can’t get the output I need/want.
To be clear, what I’m saying is while you can probably measure more output because of the higher power into lower ohms, it is very hard to hear any improvement. Whereas the improvement in bass response being more articulate, fast and flat with higher impedance is very easily heard.
Put another way, the bass at 16 ohms will sound better all the time at every volume level, except for MAYBE right at the ragged edge of max volume when it gets to clipping. While the bass with 4 ohms will sound round and slow and flabby all the time at every volume level with the only advantage being it is able to go a few dB louder before clipping.
In my case the difference I heard between 16 and 4 was huge, with the sound of 8 being closer to the sound of 4 than 16. All in terms of quality. In terms of quantity, of volume, I never heard any difference at all. So like I said before, if you listen to music then you want 16. If you look at meters then 4.