[SunnyHouTX]

I agree with Castle Creations' post there from experience. What I also found was that you don't need as "good" a battery for the lower Kv motors to develop torque. For example, a 2000mAH battery is enough for a 3500Kv motor to produce plenty of torque. The same battery will make a 7700Kv motor sputter/cog/bog down. So it seems that, given the appropriate battery configuration for each motor, both motors will produce plenty of torque.