I have yet to see woods other than red oak or poplar in board form in our all-in-one stores around here. Of those, so far I prefer red oak. I've made several good, and a few less-than-good, bows from it. The less-than-good ones were my fault a while back. I'd love to find a real lumber yard with assorted other woods in it, but no luck yet. Fortunately, I have looooooooooooots of ERC, elm, hackberry, oaks, cherry, hickory, and persimmon handy here on the place.
I'd be really happy to find clean, long, ERC heartwood bows that I could back, but that may be a pipe dream. So far, all the ERCs have had to come via stave. Which is fine; just slow and labor intensive. Really pretty though.