You should get good advice, but I want to give a caution.
I worked for two different dive shops, and here is why I left the first one, which I felt was otherwise excellent. They switched dive training agencies, and the owner of the agency they went to came in and did a week-long workshop (which I attended) on scuba marketing. One recommendation was that the shop identify one specific make and model for every piece of equipment they sold, and they were to make those specific items the target for all sales. Instructors were to purchase and use those specific items, and they were to tell their students that they had personally chosen those specific items because they were the very best available. The real reason for it was that by increasing the sales of those specific items, they would get better prices from the companies that made them, which would increase profit margins.
If you had come into our shop then and gotten advice on the very best fins for you, you would have been steered to the Aqualung Slingshot fins. You would have seen your instructor wearing Aqualung Slingshot fins. If I had been your instructor, I would have been required to tell you that I used them because they were the best, even though in reality I thought they sucked. If I had said anything else, I would have been fired.
Fortunately, I left the shop before I had to stoop to that.