I currently have a Video Essentials disc that I use to calibrate my own TVs, and anyone in my family who will let me (they all complain that I make the picture too dark). I feel like it has done a phenominal job improving the picture quality on all of my sets. I'm new to the forum (this is my first post), and am finding lots of interesting information here. One thing I'm curious about though, is this ISF callibration that I keep seeing people reference. I think I am 2 days away from purchasing a Pioneer Elite PRO-630HD, and figured that I would just pop in my Video Essentials and set things up. However, with all these references to ISF callibration, I'm wondering if I should be doing more. Thanks in advance for the help.