Roving robot

hello everyone,

im dealing with a similar project yet i am going to be using 5-6 servos. i know there is an easy program that can control servos on pwm pins nine and ten but how can i control all six. I was wondering if i could buy a motor controller to couple with my arduino, is this possible? What type of motor controller would you suggest? Or, if there is a easier alternative please let me know.

btw I know very little about what i'm doing and researching this is hasn't gotten me much luck.