Bit of a long video but covers the typical operation of Subaru engines with many useful insights I think. Caleb's comments are pretty realistic- covers the good and not so good points of the installation fairly in my view.
Quinti is basically gone now by recent accounts so no useful or reasonably priced support any more. Your choices are down to IVO, MT and Airmaster. I'd be looking at Airmaster given the price of MT stuff these days.
http://www.airmasterpropellers.com/productsThey are in NZ and have a good reputation for service from people I've talked to. Some of their
props use Whirlwind and Sensenich blades.