I've never had much trouble with steel boxes vs aluminum frame.
A couple of thoughts for you, though:
-At 20lb or so empty, rockets are pretty darn heavy simply for use as dry storage.
-I love milk crates directly in a drop bag for many items that I used to put in a dry box or ammo can: canned goods, for one.
-I totally agree on the chaos of the big silver box. One way I've tamed them slightly is to use bulk food boxes (like when you buy Oreos, or whatever, at Costco) in the drybox as modular/customizable dividers for things like staples, spices or "kitchen drawer" crap.
- Another box tamer is that I have also started bagging groceries for meals together in the box, sometimes. It's nice to not have to go hunt for the garlic bread, caesar dressing, pasta, sauce, etc. . .all buried throughout the box. Instead, grab the grocery bag labeled "Night 2- Spaghetti". It's not quite as space efficient that way, though, so that's a downside.