Ok, so I didn't go out and buy the Sigma 18-200mm OS over the Canon 28-135mm... just yet. I have been looking at hundreds of sample photos from both lenses. The Sigma takes really nice colored photos but its bokeh has got me stumped. Its bokeh is really nervous looking and very colorful. Its really a distraction and concern so I may go with the Canon after all. The Canon 28-135's bokeh in most sample photos has been pretty smooth and not as bright as the Sigma's. For me, I prefer bokeh quality over a bit of focal length. But then again, I do like the wide-angle perspective of the Sigma. Ahhhh! I am pulling my hair out. Do you have a Sigma 18-200mm OS? If so, what are your takes on its bokeh capabilities? Do you have a Canon 28-135mm IS UMS? If so, what are your takes on its wide-angle capabilities? I have read so many reviews on the web but I would really like to hear personal responses from you all here at TPF. Thanks to all in advance.