I haven't used Evernote before and have been having a play. I do like the idea of storing images with the notes - the look of a webpage might stick in my mind more than just a title or some text by itself, so it's good to have both. Plus the web can be so changeable, so it's a nice idea to have something saved permanently (assuming the permanence of Evernote itself, that is, which I suppose could disappear any day). I've played around with Diigo in the past, but I didn't actually end up using it much, even though I like the idea of it. One to revisit perhaps, and compare with Evernote. I've also recently started using Read it Later to save articles I want to come back to at a later date (funnily enough), which I quite like too.
I also like the way you can group notes together to keep multiple sources together according to a theme or event. The sync worked perfectly between the desktop version, web version, and the iphone app which I downloaded, and the web clipper extension for Firefox did what it was supposed to on my test notes. All pretty easy. I'll be playing around with this more I think to see how it could work for me. It appeals to my desire to organise stuff and remind myself of things to do (again to aid the worsening memory).