I was thinking the Miata is a pretty perfect year-round daily driver. I've contemplated a cheap NC if I don't fix the rust on the Mazdaspeed and it returns to the earth. I guess I forgot you ditched it for a GTI.
It seems insane to even consider keeping the M3 if you want a GTS. Even the taxes on a GTS are giving me anxiety.
But I don't see the appeal of the current M3, so I am not the right person to weigh in on whether it makes sense for you to keep it.