A couple places in town have performance changers and balancers, We are using a Hunter TC3500 changer, with a Hunter GSP9700 Road Force balancer.
Standard Mount+Balance on any low pro stuff is 19.95 each at our shop, a little more expensive than wal-mart or Canadian tire, but they also dont use machines designed for UHP tires/wheels, and have a much higher risk of scratching or damaging a wheel.
Hunter TC3500 Tire Changer-Changer
GSP9700 Road Force Measurement System-Balancer
Road force balancing is more expensive, I dont know offhand, but Probably in the $25 a wheel range. However roadforce allows precise match-mounting, hiding weights behind spokes etc. printouts showing the balancing weights aswell as roadforce measurements.
In any case, most of the tire shops around will do a great job for you, and probably be worth every dollar you spend. I know for sure beverly tire will take very good care of your tires/rims, and be very picky about the balancing etc.
I would just reccomend you avoid wal-mart, canadian tire etc. with Performance stuff. Simply because they often times use standard equipment not intentionally designed for performance tires/wheels. And the price is low partially because of that fact.