I tried quite a few arrow woods including hickory, hex-pine, cedar, etc...and my favorite ended up being Douglas Fir from Surewood far and away for several reasons.
1) The customer service from Surewood is nothing short of excellent. They can get me spines up to 115# consistently, and in matching weight groups! I've gone through a lot of their shafts, and came across one that had a weird spine variation around the shaft, and I asked them about it...they replaced it no questions asked even though I told them it wasn't necessary as it was one of my personal arrows.
2) The shafts are nothing short of excellent
They're great to work with...they are very consistent in spine and weight, are straight or at least very easy to straighten, and take a stain well. When I do my barrel taper on them, they consistently lose very close to 1.4% in spine.
3) As mentioned earlier, they were one of the few suppliers who could get me the quality 90-100# shafts I need for my personal arrows consistently.
POC was pretty good, but not as tough, or for me, as easy to straighten as the Douglas Fir (it may have been because they were compressed, or technically "heavily burnished")...and there was a VERY limited supply in the spines I need. Hickory is kinda hard to work with, so I never finished arrows out of them, just worked with the shafts some, but they seemed incredibly tough, but difficult to straighten. The hexshafts were a good arrow, and the quality of the work on the arrows (breast tapers, nock and point tapers) from Whispering Wind was the best I've seen, but the ones I tested for spine weren't as consistent around the shaft as I had expected, and they didn't seem as tough as the Douglas Fir.
Anyways, that's what I've found in my experimenting...I would have done testing with Sitka Spruce except Hildebrand couldn't get me any in 95# spine.
Craig