For those who have changed tires did you have to seek out a shop with updated tire changer equipment? Looking to change my tires soon and do not want to mark the wheels.Any suggestions?

I bought mine through Tirerack.com and had them dropped off at a local installer with equipment for installing larger low profile tires.

They didn't leave a mark. They did leave some sort of gummy compound on the wheels that protects the metal during installation but it came right off with some soapy water.