I am placing an order at B&H today for some things and I want to buy a ND filter. I was about to purchase the Hoya .9 Pro 1 Digital. But I see they have other Hoya filters for much less money (such as the Hoya Multi-coated). I know a lot of people say not to put an inferior piece of glass on a lens. My lenses are not that expensive but I also do not want to replace filters later when I upgrade. So, would I be putting an inferior filter on if I bought the HMC? Should I buy the more expensive Pro1?