@joekapahulu - hi there - The models that Costco sells are the previous top-of-the-line models that they've since upgraded in some way with the current models. I've got Jabra ones and am delighted with how music is with them.
Not every Costco or Sam's Club hearing aid center has the most informed audiologists, and I would go with what a regular audiologist suggests (unless they're just trying to make a sale) over what the people at Costco or Sam's Club would tell you.
I got Widex in-ear hearing aids 4 or 5 years ago, and I didn't much like them for my headphone listening; could just be an issue with the audiologist's programming; that was the best she was able to come up with.
But it's all so subjective what people think sounds good to them.