I have a 5/6 yr old Sony CRT HDTV (KDP-57WS655) that works great but was wondering if a Calibration would make any improvements for HD viewing, I use an Avia cal disc and clean the CRT's and internal mirror annualy to keep the picture sharp. Would like to keep the TV a little longer but every time I see all the Plasmas,LCD's and LED's i'm tempted to buy
