using endnote to help with quotes

Whenever I write a paper, I usually spend at least 6 hours checking through the quotes. Despite trying to be careful, there are always typos, wrongly attributed authors, page numbers etc etc.

I need to devise a system that works before I start writing up my PhD thesis.

Can endnote be used as a tool to help me do this?

My current system uses hard copy - I photocopy or print the page including the quote and keep it in a folder in chronological order as used in the chapter.