My personal favourite where pdfs are concerned is the Foxit pdf
readers.
The foxit reader is free, fast, small, unintrusive and works
perfectly.
Alternatively, you can get the foxit professional. This lets you
edit pdf documents. They have a 'typewriter' function that
basically lets you type anywhere on the pdf version. You can d/l a
trial version for free. The only limitation with the free version
is that if you save an edited pdf dopcument, there will be a
watermark.
Highly reccomended. I really really hate pdf files because they are
resource hogs. My hate for them has, however, been ameliorated
somewhat because of foxit. 
http://www.foxitsoftware.com/download.htm