I own the PB902 and I am using it to read TEchnical docuements. I am very pleased with it, large display 9.7", G-sensor, so you can turn the device and read on landscape mode, taking notes are not the best, but is the better on the market.
Depending on how the PDF was created, the features of table of content etc will work fine.
If tech documents are your main reading, search for big displays.
Hope this helps