Sorta depends, the LA will work fine for takeoffs and landings. Whats your plan for later? If you want to get another plane and move the engine over then I say go with the AX. The extra power will make any 40 size plane really perform. If you just want to take it easy for Sunday flying then go with the LA. If you do spend the extra dollars and get the AX, I am sure that it will hurt a bit at the time but you will soon forget that and be very happy when you see how the AX performs!