I would start with a APC 13x4 to hover you need large diameter for the thrust and low pitch keeps the RPMs in the sweet spot. The low pitch will also keeps the speed down. You may find that you need larger surfaces to hold hover don't be afraid to enlarge the ailerons and elevator. The wing does get in the way at low speed. The large prop will also help keep air flow over the ailerons and elevator. Just my $.02 CB