RE: engine recommendations?
Figures don't lie.... But lier's figure. Those horsepower figures are just some numbers they pulled from the air? The 40 LA wouldn't turn 15,000 without a prop. Even the best engine on there, Thunder Tiger 46, with the least practical prop for sport flying, 10-6, will turn less than 14,000
I can also assure you that the Thunder Tiger 46 is a lot more engine than the Megatek 46 any day even though the firgures you have show differently.
Enjoy,
Jim