In my experience, it's worth taking it to the shop that sells higher-end stuff, as they'll be a more popular destination and will have the staffing to handle "drop in" service and/or give you a fast turnaround. I've found that going to shops that predominantly sell lower-end stuff results in a longer wait because they get more people bringing in "beaters" that need a lot of work and/or aren't staffed adequately to do quick repairs. A good shop has people who only deal with maintenance and not sales.