A little update for the curious.
It's been a while, and humidity has been pretty manageable.
The temps range from 59 to 61 degrees F, and the humidity ranges from 61 to 66 % on calibrated hygrometers.
I'm plenty happy with those numbers.
I've got over three cases of wine and over 25 boxes of cigars in there and they seem to be playing nice.
I'm very pleased (as is the lady of the house), and my temp + storage concerns have been solved.