Hello, I am looking for your opinions on what is a good "all around lens" to keep on my camera for most shots. I have the Rebel XTi, with the kit 18-55 lens that does not get alot of good PR. I would like a bit more working distance than 55mm. I am on a limited budget, and I am hoping to get the 100mm macro lens, as macro is my passion. My other interests are shooting landscapes and wildlife. So that said, what do you think is the right lens? Do I need to get one with IS? Thanks in Advance!