I like the tackle box. I am still keeping mine on a shelf and scattered around on tables. But I think a rifle case would protect them better and allow me to move them if needed and then once I flip it open, all of them are right there in one view. For some, a double pistol case would suffice. Gander Mountain has them for anywhere from $25 to $100. They have soft foam on both sides that will capture anything you put inside.
I have been keeping my parts : batteries, LEDs, lanyards, bulbs, o-rings, lenses, clips, etc in a cardboard box, but just bought a toolbox with dividedl compartments in the lid to keep all the parts in a collection of small cardboard boxes.