I currently have a Canon Digital Rebel XT with the kit lens. I want to buy a new lens and I am looking at the Tamron 55-200 and the Tamron 70-300. I am interested in the pros and cons of these lenses, experience people have had with them, what kind of photos were taken with them and any other info that will help me decide what to get. I like to take landscape photographs and close up pictures of flowers and plants. Both of these lenses fall within my budget. I do not have much more than $200 to spend. I've also had people tell me I should buy a seperate lens for landscape and one for macro photography. While this would be the solution in the ideal world, I cannot afford to buy two lenses, nor do I want to at this point. Thanks for any help!