Chagrin:
I'd suggest the Sparkfun controller given the minor increase in cost and much larger quantities of features (battery charging, programmable Arduino). Also, the pins aren't really "pins for servos" but rather just handily arranged with a +, -, and signal for each output.75:1 means that the motor rotates 75 times for each 1 rotation of the output shaft. This would of course be slower but stronger than the 34:1 ratio version.
Thanks for clearing that up!
I'll go for the sparkfun controller then, and a 75:1 ratio version.