Re: blurry PDFs
Is it mainly images that are blurry? If so, it's probably a View Accelerator option in Evo (that's what it is called in Printready). Check the Normalizer or Preflight sequence in Evo and see if there is a setting like "Alternate low resolution images for Acrobat". If so, this is probably the cause. It's a good thing, though, so leave it on. You should be able to toggle between low res and high res in Acrobat. Look in the Plugins menus in Acrobat with a blurry PDF open and see if there is a View Accelerator or Fast View Plugin. In Printready, it appears as a menu item as well as an Icon that toggles on and off. Screen redraws are much faster with it on, but if you need to check something at high res in the PDF, turn it off.
Hope this helps.