Levenger sells some beautiful "tools for serious readers." I first learned about them when I was on my index card kick, but since then I've switched to my Moleskine planner and my 3×5"s are sitting on a lonely corner of my desk.
As far as notebooks, journals, and planners go, this is definitely something to look into if you're all for high quality and don't mind paying a little extra. Almost everything they carry can be monogrammed for yourself or your company, which is cool.
Shown above (from top) are a composition notebook, their SwiftNotes system (too small, alas, to hold a pocket Moleskine), and their index card accordion folder in a gorgeous green leather.
Check them out. If you have Levenger stuff already, tell me what you think of it. I'm considering investing in a nice notebook or folio.