RE: DA-50?????????PROPS?????PROPS??????
The 22x10 is probably the best all around prop for breakin on the DA(depending on brand!). After 4 gallons of fuel or so then a 23x10 or 24x8 will put you where you need to be.
If you can, go to the Wild Hare web page and look at the NX props. Good prop, great price. I just picked up a 22x10(for my DA!) for $25. Good luck!