Spacey

Nah, for me on the planes torque/holding torque and precision is a bigger factor than speed. You start seeing sloppy response real quickly when you have servos that doesn't have great holding torques like some Multiplex servos. Speed really only starts showing up with the planes when you hit the 30's. On my helis I like having speedy servos especially for the precision hovering but then also the only servo I'll ever buy for a heli untill JR comes up with something better is the 8915's (12kg/0.09s), been using those in both my Sylphides and my Vibe .50. If I were to buy something better for the Fusion it would be those but I wouldn't spend that money on an aeroplane unless it's a 2X2. The DS8321's are more than fast enough for me right now, I can nail lightning fast point rolls right where I want them so no problems there.