Please, if you want a proper PDF reader on your BB that does not require a yearly subscription and can read graphical PDFs, then PLEASE let Adobe know this. Send them a message requesting they release an Adobe Reader version for the BB. If enough people request this, they may actually listen. If nobody requests it of them, then the chance is zero of ever getting it. Here's the link:
Unfortunately, the 8700 renders pdf's pretty sh**y if you ask me. I have been using Repligo and I love it. It makes attachment viewing more enjoyable. Although it is a quarterly or yearly subscription, it is well worth it in my opinion. See below for link. Adobe might make something, but who knows how functional it will be or how the quality will look.