RE: Servos for WildHare Edge 540T 73
I don't have any experience with Savox servos but the torque listed is good enough for your plane. The speed of the servos will be OK for sport flying but will be a bit slow for serious 3D work, IMHO. I look for speeds in the .12s/60deg range or faster for 3D.
When I was trying to learn to hover, an experienced 3D pilot called attention to my servos being somewhat slow and suggested that I try faster ones. I took that advice and was hovering literally the next day. It made that much difference. Before the change I could never seem to keep up with the plane and little oscillations just tended to keep getting bigger until I would fall out of the hover. It was the lag in servo movement that was causing me to fall behind.