What's the best hygrometer out there?

[Sticky B]

I've had really good luck with two different Caliber IV R that I've bought. One was spot on out of the box, the other I had to tweak 1%.

POWA UP!!! I have a few Caliber IV's that are awesome & 1 Caliber IV R that was on-point as well! I really wouldn't go with anything else at this point- unless you're looking for more features, like wireless or having a system of a few set up to one monitor. At that point I've heard that these are pretty cool:
http://www.amazon.com/gp/product/B00...?ie=UTF8&psc=1
and
http://www.amazon.com/Ambient-Weathe...rmo-hygrometer

But if you want to be super-real about it, get a NIST one if that will make you feel "more certain". Frankly though, I'm not going to bother.