Notes plus is now my go-to app for note-taking on my iPad. The only time I use anything else (currently upad) is to read and annotate PDFs. A fantastic announcement was made today y the developer regarding version 3 of the app, which will, among many restructuring improvements, add the two features i have most been looking for to make this the perfect note app for work and school: Dropbox integration and PDF annotation.
Read more here: http://notesplusapp.com/versions/version-3
Pick it up in the app store. It is on sale right now for $1.99!