I'm going to put a plug in for SKB with thinktank dividers
The SKB cases are very nice, and the thinktank dividers are very thoughtful. They're much thinner than Pelican, which can be both good and bad -- Pelican dividers are not very adjustable and are so thick that they take up a ton of space, with the tradeoff that they provide more protection. The ThinkTank dividers, I think, protect enough protection, and let me cram in a lot more stuff.
The lid organizer is also a great price on these, and really well designed, compared to the pelican ones. There are also SKBs where the inside is a removable zippered container with shoulder strap, or backpack (by ThinkTank), neither of which are exhorbitantly expensive.
I'm not a fan of the cut-it-up-yourself dividers or the pluck foam, because I tend to reorganize my storage quite often -- as I buy more storage or as my gear changes.