I don't need mega security, but I would like to have one key open everything. I have about three deadbolts and five doorknobs I'd like keyed alike. I'd also like the company to exist in ten years when I need a replacement, and to be able to key that to match what I have. I don't believe I need locksmith grade stuff. My doorknobs fail in the loose/rattly mode, so something that could stand up to this would be great. Ideas!