My new Canon 40D should be arriving sometime this week. I am very excited. I am upgrading from my Canon XTi. The 40D will come with the 28-135mm IS lens. I wanted to get either a UV filter, a lens hood, or both for the camera lens. Is it necessary to have both? As for the UV filters, I saw a couple Hoya UV filters I liked, but I wasn't sure which would be best. They have a haze filter and a polarized filter. Which one should I go with if I get a UV filter? Thanks for your comments and suggestions.