I'm not overly familiar with e-readers, so I'm hoping that someone here might be able to point me in the right direction.

I'm interested in getting an e-reader capable of dealing with large (A4 >5000 page) PDFs for technical datasheets. So good handling of contents, references, and bookmarks, text search that doesn't take too long, and ideally the ability to make annotations with a stylus or so, and the ability to view non-consecutive pages side-by-side.

Online connectivity would be nice as well for reading paid periodicals.

I'm guessing that the Boox Note 2 might be the obvious choice, but might there be something cheaper or without the Android overhead that would suffice?