Following up on this…
I’ve played around with PDFPen for annotations a bit. To be honest for annotations it’s no better than Preview for my purposes (Mac’s Preview is damn good). But PDFPen does OCR (optical character recognition), which has proven very useful on a few occasions. There’s an iPad app for it, but since I don’t have an iPad yet, I can’t speak to that. Additionally, PDFPen does allow syncing with iCloud, which will be great on my future iPad, less good on the Windows computer at work.
I only just clued in that I can add the PDFs to Evernote, and then read them from there. However, I cannot annotate them with Evernote; I need to open them with another program to do that. If a PDF has been annotated with Preview or PDFPenPro, the highlighting and underlining appears in the Evernote window, but added annotations do not - just a little symbol indicating they’re there, and I need to “open” the PDF with the relevant program to actually view them. Fortunately, annotations made in PDFPen work properly in Preview, and vice versa.
Now I’m trying to figure out where I want my academic PDFs - on my hard drive, synced with SugarSync, or in Evernote and then very easily available everywhere? But if I basically move them to Evernote, I’m going to screw myself on occasions when I can’t get online, whereas SugarSync does save local copies of whatever’s been synced. Basically Evernote seems a good way to collect them all, and it’s great for searching and organization, but I worry about trapping myself in a system without much flexibility - and a system that assumes a permanent online connection.
One lurking issue is bibliographies: I gather there’s software out there that makes this a piece of cake, so if I’ve got an article that I first submit to somewhere that wants MLA, and then to another that wants APA, I can change the bibliography with a click of the mouse, and needn’t spend hours messing around with it. I’ve never yet used such software, but I suspect having the PDFs “free” in my directory gives me more future flexibility.
EDIT: It also looks like I can’t annotate a PDF that’s in Evernote when I’m on my iPad: if I’m understanding this link…
support.evernote.com/link/porta … up-to-date
… correctly, on an iPad I’d be able to read an Evernote PDF that I’ve already annotated, but I wouldn’t be able to change it in any way. That’s a definite strike against the Evernote option.