Mac vs Windows PC: Annotating and Marking Up Adobe Acrobat PDF Documents – macFanDave:
Real life story from yesterday: I'm asked at work to make some amendments to a PDF document. Our corporate PC's come with Acrobat Reader only. My boss thinks I'll print the original, write the changes on the paper copy, scan it (essentially making photographs and saving them in PDF format) and send it to the people who need it. You do realize that my finished product is not longer a document — you can't search the text (or copy, cut, paste, edit) since it is now merely part of a photograph.
I quickly went back to my hotel and got my MacBook which comes with Preview FOR FREE. Preview lets you annotate and markup PDF documents, so I was able to do that and send the people a real PDF document with our proposed changes.
The list price of the cheapest version of Adobe Acrobat is $299.
Your PC may have had a better price on the day you bought it, but my Mac has given me superior value. If you continued to spend the money to bring your PC to be able to keep up with my Mac, you'd soon have spent way more than I did on day one.