My 09 27 inch iMac is on verge of crashing (esp iPhoto) - need recommendations for apple certified premier in home service providers...

Need in home apple certified service provider recomendations - my imac is on verge of crashing. I constantly get the spinning wheel and am sure my iphoto library with 40K photos is also about to crash... I back up on timemachine with an external hard drive but need someone to help me organize and tune up... I don't want to take it into my local apple store. Suggestions for certfiied in home mac specialists? I live in the Western Suburbs of Philly...