I've been a proud Canon Rebel XSi owner for two months now and would like to upgrade from the basic lens to a telephoto. I mostly shoot outside and would like to get more birds and animals. My budget is $200 or under. A macro feature would be nice, but not necessary. Here is what I found in my price range: 1. Canon EF-S 55-250mm f/4-5.6 IS Image Stabilizer - Refurbished ($199.99) 2. Canon Ef 70-210 4.0 Lens Metal Mnt Used ($199.99) 3. Canon 100-300 f4.5/5.6 Ultrasonic (58) 35mm SLR Telephoto used ($199.99) 4. Tamron 75-300mm f/4-5.6 LD AF Macro Auto Focus Zoom Lens ($134.99) Which of these do you think is best? Or, is there another lens I should be looking at?