How about a 10x6 prop. According to the chart, this will draw 6.9A at full throttle and produce 345g of thrust. Projected run times are 12 min at 100% throttle, 16 min at 75% throttle, and 26 min at 50% throttle. I like this prop because it also produces reasonable values when I use a 720mah NiMH battery -- so I don't have to change props when I change batteries.

Is thrust the only consideration there is when determining how a prop will perform?

Matt