""Are there any other good options besides the three I listed?""

I use this method with all my PDA's.
I went to the hardware store and bought half a yard of 36 inch wide crystal clear plastic sheeting for about $2 (enough for about 60 to 75 protectors). It's maybe half a mm thick. I cut it larger than the screen by about 3mm in each direction, then slid it under the screen bezel. No glues, no residue, it just sits there. When the air between the screen and the protector is squeezed out (which happens naturally when you use the nokia for 5 minutes) it doesn't move...at all.

You can't tell there's a screen protector on at all, in fact it somehow looks even more vibrant than without, and the price can't be beat.
It removes in a couple of seconds, just wet an index finger slightly for grip then slide up one corner, can be cleaned (windex), and reused.