I'm looking to replace my stock lens with a Sigma 28-70mm f2.8 EX DG. It'll probably be my 'walk-around' lens. I've read a ton of reviews on the lens and I've seen opinions going both ways - good and bad. First off, here are my personal impressions from what I've read: Pros: - Affordable - Well-built - f2.8 - Light weight Cons: - Loud AF (not a big deal to me) - Pic quality can be soft are f2.8 - Flare can be a problem - Some people claim it sucks in low light (which WOULD be a GYNORMOUS issue to me) Here are some links to reviews by others: http://www.the-digital-picture.com/Reviews/Sigma-28-70mm-f-2.8-EX-DG-Lens-Review.aspx http://www.fredmiranda.com/reviews/showproduct.php?product=100&sort=7&cat=37&page=2 http://www.testfreaks.com/click/out...268/lens-test-sigma-28-70mm-f28-ex-dg-af.html http://www.photographyreview.com/mfr/sigma/35mm-zoom/PRD_331082_3128crx.aspx http://www.dyxum.com/reviews/lenses/reviews.asp?IDLens=212 So basically I'm looking for a nice replacement for my stock lens that has a good general range but also addresses my need for low light shooting (ie. indoor sporting events). I'm aware of Sigma's rep for producing duds right out of the box but I'm willing to risk the headache for the price. Anybody else have any personal experience with this particular lens?