Thanks neuro and others, I think I'm leaning towards the B+W 77mm Kaesemann XS-Pro Circular Polarizer MRC Nano Filter; The Tiffen that I have now is pretty decent, I just don't like how I can't mount a lens cap to it. I'm considering spending this much $ on the filter ~$200 since it seems to be high quality and I can put it on my two landscape lenses. I'm not sure if I'm ready to spend that much cash right now though and may wait for a sale or a deal from someone as I'm trying to save up for a new lens as well.