I hear this is the best wide lens around, especially for Canon EOS cameras, and I have a Rebel XT, which I've heard is perfect for this lens. I just came into $1000, and I've been needing a wide lens, I was considering the Sigma 10-20 since it was cheaper, but everyone says if you can afford it, the Canon is best. Since this price I found is not too much more than the Sigma would be shipped, do you think I should go for it? I just want a little support, I'll probably buy it anyway! Please reply!