Hi guys

I am about to get a new engine for my showtime (2 or 3 weeks) and i was going for a O.S. 91 Surpass engine but with the new price I just don´t see any reason to get it when i can get a bigger engine for less or the same price and I want to know what Saito engine will be the best for this plane
I was thinking in 3 engines the Saito 91, 100 and the new 115 if my dad let me spend $310 for a new engine (was planing on spending 250) I would really like to have de 115 as it weight a bit less than the O.S. 91 but i don´t know if it is going to be to much engine for the plane

Almost forget it, what prop will be the best for each engine on 15% nitro, I have to switch between props on winter and summer because it gets to hot for a low pitched prop here so what props will work for each engine (just to give an example on my O.S. 70 surpass i switch from a 14X4 to a 14X6)

Thanks for the replys guys
Sergio