PDF Manager & Annotator

I love Zotero's ability to manage/store and annotate PDF files. I am in academics and end up downloading quite a few PDF journal articles through my institution. I don't want to have to purchase all my journal articles through Logos (nor could I - many are unavailable). Additionally, it would great to be able to use Logos to store ALL my research, not just some of it. I was noticing this today as I worked on a Clippings document of quotes for an upcoming research paper. It was great until I downloaded an article and could no longer do my work in Logos. I had to switch to a different app to complete my research. This would help me a lot! I wonder if others might benefit from a feature like this?