I have a Little Havana 'Perfecto' hygrometer, and it has always tested spot on!
I also have a couple HygroSets and a Don Salvatore or two. The Little Havana
models are often 'sold out', so go with a HygroSet. They were on CigarMonster
for $17 with free shipping, recently. Keep checking.
The Csonkas seem to be nice, too. A buddy has one.
If you use beads you shouldn't need to worry too much about rh, until you find a
digital hygro.
Chemyst
BTW, there might be an adjusting screw on the back of the analog hygro. Turn
it until it reads 75%.