I dont know why, but It is hard to beat some of the exotics.
I recently ordered 100 PH dowels from dowel on demand, and he put in about 20 extra samples for me to try.I turned a head and put in a purple heart peg and played a call, Excellent results. I took the PH out of the head and tried an osage peg that he gave me, and then a hickory, and then a bubinga, and then a jatoba, by far the exotics outplayed the domestics with jatoba winning first place. I wish now i would have ordered some jatoba as my stock is running low.
I would do like Vince says an order a buch of dowel pegs from dowels on demand, try 3-5 of each. Get some various domestics, get some various exotics and try em out to see which ones play well for you.