I've gotten to like Staples' Arc notebooks. They fold over like a spiral notebook, but pages can be moved freely like a 3-ring binder. Downside, instead of holes, sheets have notches in them to keep them attached to the rings that form the binding. This can be problematic sometimes if you keep moving a sheet around a lot, but I typically don't move a sheet more than twice (once to put it w/ related content, again to archive it if I get around to that). And they aren't suitable as pocket notebooks, but I don't consider that a major issue for myself.

But this helps me a lot for pen and paper notebooking. One of my biggest issues with getting a spiral notebook or moleskine-styled notebook is that entries are completely jumbled, organized only by when they were entered. These let me reorder my pages freely as different projects and types of entries are inserted.