I agree with ProfCrash. If you read a lot of PDFs you are going to be much better off with a cheap tablet and something like Mantano or ezPDF reader. The reason is they provide for better zooming and panning. Something like this:
http://www.amazon.com/Coby-7-Inch-An...ta/B005HUH88K/
Most e-readers support landscape view which may help. Many will do PDF Reflow but they don't do a very good job in my opinion and leave a lot to be desired.
Here's some info on e-books for Canada:
https://www.mobileread.com/forums/sho...highlight=sony