As soon as I read the thread title one plane came to mind... The Sig Something Extra... Then I read your requirement for 2:1 power to weight ratio. You will have to put abour a Saito .82 at minimum with a 14x4 prop to acheive this and the stock landing gear will only allow you to put a 12 inch prop on it and that is still verry close to a prop strike if you cant do a 3 point landing. Try a any profile from Ohio Model Products as they are designed to have clearence for big props.