Say it looks like I have another three choices for a 280 motor.

1. The Mega Mig 280: 20 watts, 3.3 amps, 8 oz. thrust
2. Speed 280 Race Motor: 58 watts, 5.8 amps, 12 oz. thrust
or 3. Speed 280 sport: 57 watts, 5.7 amps, 10 oz. thrust.

All with 4:1 gear ratio's
I would prefer the two highest thrust motors but they both have high amp draws and a size 10x7 prop is reccomended. Will they not burn up if I use a 10x4.7 prop. The prices are all basically the same so which one do I get?