If you want to do fpv and load it down with a heavier battery, the ntm motors that they recomend are . I use them in the spit, baby blender, and will in the versa wing once I get around to building it. Just a future upgrade possibility.
I don't know if anyone else has tried it but mine also flies great with two DT750s. I have 9" props but don't the pitch off hand. They're pretty steep.