I've had my tires balanced twice and an alignment once at Liner Tires in Brookline. Great guys there, get all sorts of rides coming in. They charge about $25 to mount & balance a tire and you can get alignment done for $50 using their 50% off coupon.
'08 E92 335Xi - Premium, Cold and Sports Packages
JB4 // AFE DCI // Matte Black Grills // MTEC Angel Eyes // CF Mirror Covers // Forgestar F14's