Cabinets, although costly are an excellent choice because they protect stored items from moisture and dust - and almost always require a contractor for installation. Stackable plastic containers placed on shelves are much less expensive and also have the advantage of providing visibility of the contents..
Designer Tip: Lower or remove the top shelf on each book case and hang a framed print on the back of the book case... to fill in the back wall of the top shelves. Then place one or two small decorative objects on each shelf. Or remove one middle shelf (this is more ideal for narrow book cases) and display a tall object... like a vase... flower arrangement... scultpure.
You can develop your own modular shelving. The basic system is perfect if your motivation is to customize your modular shelves. The beauty with this system is you can assemble your own design lay-out configuration. When you feel that it is time to re-configure the shelves, you just disassemble it and create a new one.
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