RE: Prop options for a DA-50
Best bang for the buck is Xoar laminate props. I simply cannot find anything made of wood that beats the performance.
JXF, TBM and some other cheaper brands are too soft for me. Menz S and MSC props are interesting but take getting used to.
Breaking in using a 22x8 is your best bet. You can change to the right size after 4 gallons (22x10 or 23x8).