I'd go with someone who will explain why to you, it is hard to keep a lie up with detail. I recently started back riding. Took the bike in after 5 years for a tuneup. Tires and tubes had to be replaced. They did not try to sell me the most expensive tires out there. Instead thye pointed out the advantages of high end tires and the various advantages of various tires (eg performance vrs. flat resistance).

They had trouble with my front wheel. They could not get it true. Once mentioned it made sense. I hit a bad pothole years ago and while my rear had been replaced since then my front had not. Sooner or later you will know details of your bike and what guys in a shop say either will or will not make sense compared to what yuo know.

Oh and listen to any gear geeks you ride with. Guys you ride with at least don't have the bias of wanting to push something because of the markup.