i save my pages as PSD and JPG images at full size (it's a 10 on the scale for JPGs when saving). i use PDF when i'm sending a document to other people that might not have the program i made the document in. i found a great free PDF program online (
www.pdf995.com) that i use to make PDFs when i'm not using PSE. if i were you, i would save images as PSDs and JPGs and forget the PDFs unless you need to send those documents to another person. JPGs are what you'd need to save a page as to print it like a picture or post online, so that's probably going to be the most versitile way to save your documents. saving as a JPG also flattens the image for you. I always save my pages as a PSD in case i need to go back and change something. hope i helped!