PDF plugin question

I have very large PDF documents (yearbooks) that I would like to incorporate into our Omeka digital collections. What is the best plugin to use? I find that I am struggling to keep under the 2 mb limit. I also find that most of the PDF’s are blurry. Is it better to utilize PDF Text or the Universal Viewer plugin? When a user selects a thumbnail, I want the PDF to open up on a large screen, as it would if I were opening a PDF in any other capacity. I also want to allow our users to search through the PDF. I look forward to your thoughts.