As for UCT issues, does your hPDA have a cover page or something similar? If so, why? When you pull it out of your pocket, you should have a writing surface immediately available, with no fiddling with binder clips.
I use a "jotter" (this one: http://www.ebags.com/royce_leather/t...?modelid=60761 ) to hold index cards, and I use those cards for collection, not for schedules or reference. That's what my main 5.5 x 8.5 inch planner is for. Your situation may be different.