FWIW, when choosing between a few props I’d recommend going with the largest diameter that will fit properly
(tip clearance, etc.) and then pitch
from there. Sailboat props are nearly always smaller in diameter than the ideal in order to make them fit where they need to go. Of course, that’s a generalization and there are always exceptions.... YMMV.
But, if you’ve had two prop failures within a few years I’d recommend looking for root cause first. That failure rate is unusual/high (to me anyway) and I’d want to know why before investing in my third prop.