Amen brother on the APC 12.25x3.75. Pending the plane it's on. Slow prop but tons of pull. MAS is the best choice for starting out-flexible and cheap. APC's are very breakable but perform better. It really all boils down to the plane and what you and it are capable of. Starter planes-MAS, more advanced planes-apc, expensive advanced planes-APC,Wood, Carbon fiber.