a little advice....
Hey Gary,
as a -9a driver for the last 6+ years, but not many hours, I have to suggest that you get as many rides as possible to narrow down options like these.
I bought, not built, so my choices were much fewer, but still, if you are building a 900 lb flyweight, good for you....but......
If you think you might want to haul your big buddy and some gear over the mountains on a hot weekend, you would really like the feel of a C/S prop with 180 hp bolted to the firewall.
spending some butt-time in other birds really helps me decide where I want the cup holders, fuel valve, and everything in between!
just my silly opinion, good luck!