RE: SIG Fazer
Actually, you'll need a bit more than 150-200 Watts. The power system will add about 2 pounds to the total weight if you use LiPolys, more if you go with round cells, so you need to plan on at least 5 pounds in your Watts calculations. 200 Watts on 5 pounds is only 40 Watts per pound. This is a Fazer, the original profile fun fly. 40 Watts per pound will barely get it in the air.
You need at least 500 Watts, or 600 Watts if you want the plane to fly as it should.
4S LiPoly would be ideal. That's equivalent to about 14 cells (2S LiPoly is about 7 cells). For an outrunner, I can give my personal recommendation to the AXi 4120/14 to handle that much power. I'm running mine on 16 NiMH cells, and it really has some oomph on my 6lb .40-size Corsair with a 12x8 prop. There is a 4S2P pack of Kokam 2000 15C cells waiting to be installed. Due to the slightly lower voltage, I think I can run a 12x8 3-blade prop for a more realistic look.
For you, I'd recommend putting stilts on the bird and running a 13x10 prop.