What is the AUW of this model? With a 53" wingspan, i'm guessing somewhere in the neighborhood of 9 to 12lbs, depending on how it's built. I would certainly consider the OS 91/Dynamax combo. For the performance, I think it's one of the more reasonably priced packages out there without breaking the bank. I have many videos of ducted fan meets throughout the country from back when turbines were only starting to come out into the market and this is the combo most of the big names used...from from small single engine models to the big twins, and they flew with great authority!!! JMO