Perpetual:

I had a G-62 in it. It flew very well and was impressive in the sky. I used Hitec HS645s all around.

I don't think you need to worry too much about the dihedral as long as the incidences are OK and same on each side. I don't recall whether the incidence of the top wing matched the bottom wing. (Another question to ask Sig.)

Your Brillelli should be a good choice. The G-62 had good power, but it was heavy and I had to move the batteries to the tail and still add some balance weight.

Jim