I've recently bought a new DP1, the original version, so I assumed it must be old stock. I used to have an SD9, which I sold after after a couple of years. Since then I've missed the quality of the images it recorded so I've bought a DP1. I'm now tempted to buy a DP2, but what are the opinions on these cameras regarding their life-span? I've read a few posts in various places detailing camera failure and even shoddy customer support from Sigma. Am I right to feel a little concerned over the robustness and longevity of the DP series?