I recently bought the Canon EOS Digital Rebel. It has the original 18-55mm Canon lens on it. I also have a Sigma 55-200mm f/4-5.6 lens coming in the mail soon. I mainly take pictures of outdoor scenery/landscapes and at some automotive events. Should these lenses be fine? Also, I do love to take macro pictures, so I'm looking for a decent (not crazy expensive, possibly used) macro type lens. Any suggestions?