So I am looking for a laptop and I want the retina. However, there are a lot of threads about ghosting and graphical issues. Is this a widely known problem? I know some will have issues, but it seems they all do? Does the 13" perform better than the 15" one (in terms of ghosting)? I would like to get the top end stock 15" one, but I am concerned with these ghosting issues. I know no device / hardware has 100% successful, but it seems like everyone that has the retina has these issues.