I have a commercial client who has me shoot granite installations for her. Until now using creative angles + an inexpensive polarizing filter have been plenty sufficient until today. I had to reschedule one of her clients for the second time, which is painfully unprofessional, because their combination of white cabinets and very dark granite countertops made it impossible to capture usable images. So, in order to keep her as a client I'm going to have to get my hands on higher quality polarizers. As a portrait photographer, I don't know much about them. Can someone recommend some high quality polarizers that will go a lot farther to minimize reflections than the cheap Tiffen one I'm using?