[PhasmaFelis]

I basically want three things: (1) easily searchable/browsable organization, preferably in a tree format; (2) decent rich text features; (3) clean syncing between Windows, OSX, and Android.

rtf+Dropbox would fulfill 2 and 3 (with the right Android app choices, anyway), but 1 is somewhat dubious. Previously I've tried Treepad/Jreepad, which is absolutely perfect for 1 but fails the other two; TiddlyWiki, which mostly manages 1 and 2 but requires a lot of manual markup, and (since it's all in a single file) would have problems with 3 if one copy got out of sync; and Evernote, which mostly manages 2 with a few hiccups, does 3 in theory if you don't mind frequent inexplicable conflict warnings and occasional outright data loss, and seems to be trying to break 1 more with each new version.

I'm hoping to have time to look into OneNote today and see how it measures up.