The Flair Extra 300 90 aka CMPro will not be able to give you good 3D capabilities or unlimited vertical with a 91 2C, you will need at least a 108 2C for that, your plane might be a little nose heavy. The CMPro planes might be a little heavier than stated. I seen the ARF and its very nice, lighter than the CAP 232. I would not dare to say that the Flair Extra is lighter than the WM one ... WM are pretty accurate with their specs on weight. I think for an 8.5-9 lbs (3.9 kgs is almost 8.8 lbs) plane a Saito 100 would be very nice.