Hi all! For a while now I haven't been overly happy with the lack of colours in my photos using the kit lens for my Rebel XT. Short of spending big bucks on a new lens, I'd like to try a circular polarizer. My question is, will the cheapie CPL's on e-bay do a decent job? Or should I go with something around the $30-40 range? (no, I'm not really willing to spend more than that). Thanks a bunch!