I'm using a single Futaba 9303 metal geared servo which rates 100oz of torque with a 6v battery. My feeling is that metal geared servos are the way to go...I'm afraid nylon could strip.

Regarding the moki 2.10...It has pretty good power for the extra, but it's not powered like a TOC gas machine. I can power out of hovers etc., but it will not rocket out. I don't have a real good scale so I can't be sure of the weight, however on a bathroom scale it weights around 13lbs. It flies like a featherweight, very light feeling plane.