I haven't tried Hickory for the reasons that Pat states above....very humidity sensitive. I use Ash...a lot. Kootenai River Archery bought Allegheny Mountain last year and is providing great quality shafts at good prices. The value is much higher for these woods as, let's face it, they rarely break.
If you are switching to hardwood arrows from say Doug Fir, POC, or Sitka....plan on a longer period of time spent getting them straight. I don't like to use heat or compression, so I straighten them a couple to three times/day over the course of 4-5 days before they're ready to start with the color and sealing work. May not be for everybody, but they're soooo satisfying when they hit home.