This is why I went with a higher mileage (31k) car. My thought process was that in the first 31k miles, hopefully the prior owner knocked out all the original teething issues. And other than the glaring issues that I outlined in my car's thread, this was the case. I don't have misaligned panels, I don't have poor alignment, I don't some of the original issues. I did have the clunk and milling sound, but the 4 miles I've driving on my replacement drive unit didn't exhibit this problem. As to MsElectric's point, this is also why I wanted to see the cars prior service history so I can be on the lookout for any of the original issues that may not have been addressed yet.
Have you tried again to get your car's service records? Good point with the service records being an indicator for which known issues have been addressed. Personally if I were buying an early Model S, seeing a service entry where I see an "A" battery pack was replaced with a later revision would be good news...
Has anyone who is about to buy a CPO Model S asked to see the service records?