I hear your complaints about the scroll left-right-left-right issue when trying to read pdfs. Basically, it's either squint or scroll...

Or, you can use Calibre (on a desktop computer) to convert those PDFs to epub format and then use FBreader on the tablet... set your font to whatever, maybe adjust the margins, it remembers where you left off on the book, can rotate the display (which, oddly enough, makes for easier reading), allows multiple books at the same time...

I just tried it with a text document, worked well enough. The magazine scan, not so good. So, if there's text to convert, then you can massage it into FBreader and it's great. If the source is a picture, rather than text, then it's a little more complicated, with OCR and the like.

While it doesn't quite answer your question, abandoning PDF will get you where you want.

David...