I had a need to import some CAD drawings into my Visio document. The CAD drawings were provided to me as PDF documents. Visio has no native way to insert a PDF into a drawing. SnagIt to the rescue. Besides being an excellent app for making screenshots, it installs itself as a printer. Well, all I did was print my PDF to the SnagIt printer, saved the image as a TIFF, and then inserted the TIFF into my Visio drawing.
The resolution was quite good and I achieved exactly what I wanted. Gotta love it when shits works out!