I recently purchased a Canon T2i with a Tameron 17-50mm F2.8 lens and now want a second, longer lens. I can't afford L glass or anything in that price range, unfortunately, so it's down to something in the hundreds of dollars range. I'm leaning toward the Canon EF-S 55-250mm f/4-5.6 IS, but I'd love something faster. It has to be image stabilized. I'd be happy with anything that starts at 50mm and reaches 200mm or better. Any suggestions? Thanks in advance.