Here we have a very good review of UV and Polarizing filters by Lenstip. They even comment on the usability, and flare associated with each filter. All in all a very good test, and one that could save you a LOT of money!
My name is Andrew Gough and I am a travel stock media producer. I produce video and stock photography from all over the world. I have been shooting commercial stock photography for over 20 years, and I have amassed a very large collection of global stock photography. Today, I am now adding stock video as well.