I wolud go with a saito 100 for good 3D preformance with APC 16x4W. I had a saito 100 in mine running 30% fuel for good pull out power. I few it so often I wore out the motor and installed a OS120 in its place. A .91 would fly it good but if your looking to do a lot of 3D you would be much better off with the 1.00