I'm in the market for a 70/80-200/210 f/2.8 lens for my Nikon Pronea 6i and wonder if there are any head-to-head comparisons between lens from Nikon, Sigma, and Tamron. My budget for this is under $800 USD, so the new Nikon Silent-Wave is out of my price range. I'd appreciate any ideas you might have on this. Regards, Rob Hoch <A HREF="http://members.aol.com/eiscoinc/EISWelcome.htm">Evergreen Information Systems, Inc. </A>