Over the years I have been relying on my 2007 base line iMac for everything, and it wasn't after a long trip that I came back to use it and for the first time noticed a serious screen issue. The monitor turned a deep yellow tint, and on certain colors, anything thats not black or white really, it shows horrible thick vertical lines of a deeper yellow. The more I use it now, I'm finding that its actually screwing with my eyesight even (a bleaching like effect). Maybe its the lack of brightness (which has also seriously decreased it seems) or maybe the color; but it only occurs on my iMac. Not my iPhone, not my TV, not my MBP, etc... I know little when it comes to monitors sadly, just never was a strong factor for me, however now that I am looking into a 2012 iMac, I cannot help but read up on comments and hear a wide spectrum in details, that often conflict with one another. Ultimately, if I make this transition, what could I expect based on what I know? Are these the same types of monitors? Will these same issues redevelop over the years?