Hard to advice something straight... depends of Your funds. Is it going to be circular filter or square? If circular, economic chocie would be Marumi - I had it some time ago and I was happy, now I have circular polarizer from Hoya - HD model and I am happy too. from square filters I recommend NiSi system and filters. Like I said, it is always depends from money You want to spend on. You can also check the reviews in the net, helps a lot.