I'm looking for a "normal" prime for my Rebel XT. The guide over at Photo.Net recommends the Sigma strongly, but the Amazon reviewers say that many, many copies of this lens have manufacturing defects. The Canon alternatives are 35mm (cheaper, but slower, and a bit long), and 28mm (a bit more expensive than the Sigma, and slower). Has Sigma stepped up their game and worked out the manufacturing defects? Or am I still running a significant risk by going with them? If Sigma is a no-go, would I be better off with the cheaper 35mm Canon or more expensive 28mm Canon? FYI, I'll also be picking up a 50mm f/1.4 for when I want to be a little closer. I've been pretty much sold on the idea that sub-$500 (perhaps sub-$1000) zoom lenses are garbage.