I just saw you are a new member so first of all, wellcome to the forums. The polarizer you are describing it is very cheap but you might want to check this page
Photo - Hoya Filter. Hoya have different qualities, the DMC are cheaper than the super HMCs which are closer to the BH and Heliopan. I have the super HMC and I am very happy so far. I would advice you to expend more money in a thin 77mm and a few step up rings (these are inexpensive) so you can use it with most of your lens. Other people might give you better advice.
PS that web store is based in hong kong so expect a shipping close to 40 dollars. It really worth it if you want to buy several filters to cheapen the shipping.