Probably common knowledge, but Warforged Composite Plating doesn't have a maximum Dexterity bonus. Neither does Ironwood Body, but the ones that actually provide a decent armor bonus do. Still, this could conceivably serve a niche, since it'll save about 40000 gp compared to +8 Bracers of Armor on a high-dex build at the cost of being a Warforged and thus setting back your Dexterity by 2, and spending a feat. Generally it's a losing trade, but there may be more advanced stuff I haven't thought of.