Thanks for the link to the little cases, I like the magnetic option.
Buckets are definitely the best for certain tool sets (like plumbing, plastering and masonry for example). My plumbing kit is actually built around several nesting buckets. You always need a extra one… and you can turn over a bucket and sit on it if your feet get tired!
I still haven’t figured out the best case for my new Fluke T5-600, though; I need something that will hold the extra probes and alligators and maybe a roll of tape, and the Fluke-branded cases and holsters are both cheesy looking and ridiculously overpriced.