I agree with jkanters. Until recently, I was using Ref Man, but all my students are using EndNote because they can get it for $99 academic discount. So I switched.
After downloading references from Web of Science and Elsevier and other sources, I get journals in odd formats (e.g., all caps) and keywords I don’t want. If this happened in Ref Man, I could merge the incorrect journal name with the correct one and merge the undwanted keywords with ones I already have. Can’t do this in Endnote. The suggestion just above for Endnote is cumbersome (as jkanters wrote) compared to what RefMan can do.
Joe