I am looking at purchasing the D800 again, I purchased 4 in the past (May-Aug 2012), all had several issues including left auto-focus issue. With the current rebate a new body is $2800 however Nikon is selling refurbs for #2400 and I can purchase an extended 2 year warranty for $150 more. What are the opinions out there of which one would be good to pick up knowing the QC issues? I know all don't have issues but more than normal are suffering from some QC issue. Looking for opinions before I pull the trigger.