Outdoor Storage Cabinets (Resin/Plastic)?

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I have a need for an outdoor storage cabinet that will have to be exposed to the weather. I don't want anything permanent and it must be movable (if need arises). I have found 2 that seem to fill the bill but am looking for comments on quality and toughness before I buy. I am looking at a Rubbermaid product (available from home depot) and a Suncast Product (available from Sears). Home Depot has the Rubbermaid cabinet on display, but Sears does not have the Suncast product available for view (special order). Has anyone had any experience with either of these products and care to provide a comment or opinion on their construction / durability? Thanks for your time.