My g/f just dug out her Canon Digital Rebel for me. She has a 28-135 Canon zoom with a IS (big, bulky, heavy, don't need IS). I have a 35-50 canon cheapo-zoom with a crack in the collar (good size, but yuk). I'm looking to spend around $300, for 1-3 lenses that would give me a lot of versatility. I'm thinking Tamron, but I'm not married to the brand. Suggestions?