Quote: "As a question how are the free ones at editting the PDF, or do you need to redistill for changes?"
The PDF format is really a 'one way' thing. You aren't really supposed to edit PDF's, but instead edit the original document and remake the PDF file. The full Acrobt package does allow some editing to fix spellings, add notes and some very basic layout changing but its not really what its designed for.
Quote: "As for acrobat taking a 1/2 hour to open I have to say you must have a 33 mhz machine or something because for me it opens in about 3 seconds. (Version 5.0)"
Version 5 is quite quick. Versions 6 and 7 are very big and clunky in my opinion. Plus I believe 7 tries to do automatic updating by default. Nasty.