I am new to all this home theater tech stuff, but trying to learn by reading the discussions in this forum. One of the givens seems to be that even the best TV's need to be calibrated... either by a professional or as a DIY'er. I have ordered the AVIA disc and plan to try the calibration myself. As a newbie, what are my chances of getting even a mild improvement in color accuracy using the AVIA calibration disc ??? Would I have been wiser to spend my $$$ on a professional calibration ??? I am also curious what "ISF" stands for ? NOTE: I have the Sony KV-34XBR800 & will use it primarily for viewing DVD's.