
Peachbottom |

I use sterilite storage drawers.
The various units are stackable and the 8-1/2" x 11" units can hold most large and medium minis. There are a few "extra large" large minis that don't fit though. I use poster board to create dividers if I need one.

Caineach |

How much you care really depends on how well painted they are.
At this point, I think I like KR mutlicase over Battlefoam, because you can more easily customize trays for varying size models, but both are good products. If your not transporting them regularly, Battlefoam also makes cardboard boxes to store the foam that can cut costs dramtically.

Degoon Squad |

I prefer Feldherr cases here.
https://www.feldherr.net/feldherr-storage-boxes-1/
But for prepainted plastic I just buy storages cases in the tool section as the paint job is pretty sturdy and plastic bends.
One thing I have notices is plastic storage trays cost different in the tool section, in the Sport section(for fishing), and the craft section with those in the craft section costing the most and in the tool section the least.