Can someone PLEASE explain the issue with the valve bodies and their warranties to me? I decided I want a triple white NBC but not if it's going to break down on me later. I'm looking for one with 30-50k on it used. So are the valve bodies to be replaced on these as well? I'd be getting it in q1 of 2014, so would the extended warranty be up by then? Would it have to be replaced as soon as I got it if the first owner did not? Any help/ advice would be great..