I cant speak for any shops in Canonsburg, but I've used RPM's in Cranberry before and they seemed to know how to handle a high end wheel.

Link to their crappy website here...
(not far off of 79)

They also had (assume they still do) a hunter balancing machine.
The guys were cool with me and actually fixed a slow leak in my tire for free.

Another solution might be to use TireRack's preferred local installer search to find some quality shops...

Hope that helps some!