You're right, it's an addiction. I have 2 sopranos (for grandkids), 2 concerts, 1 tenor, 2 baritones, 1 banjouke. There's another one somewhere ...
Depending on your experience with the bass, and my experience playing one at the Kala factory demo room, I might get one.
Can't see me buying a micro, but the luthier has one hanging in his shop.