I checked out the PDF-XChange Editor and purchased it. It was faster than the Foxit Reader and has highlighting of the search terms. It is just the software I need! It enables me to be more effective in evaluating the many PDF research papers I have in my digital library (over 10,000). It has more commenting features and a better and faster file search (with context of line, paragraph, etc.) than Adobe Acrobat. Plus all the other features. I had been using Acrobat for years but not all that happy...
Andrew
USA