I've been doing a lot of RCU research over the last few months on airplanes in the 78" wingspan range. What has got me confused is the wide range of weight and power that I'm seeing. On one hand, you have a typical 2M pattern ship at 11 lb with 1.40 glow power. On the other hand, you have a 16 lb Extra ARF with 50cc power. Both airplanes have essentially equal wing area.

It's difficult for me to guide my own decisions when I see such a huge range. What's the best weight and power compromise for Scale Aerobatics in this size range?