Thank you for all of your excellent advice from your well earned years of experience in this wonderful activity. With regards to calibrating a set with the AVIA disk (or Video Essentials, take your pick) I still find myself tweaking the picture settings as hardly all disks are uniform in the engineers intent. What are your thoughts on calibration? I have a Sony 57 HDTV - RPTV which I am on the whole, very satisfied with - especially with HDTV. However, I find that some DVD's tend to be a bit dark - even with my attention to creating the best environment for viewing, i.e. very dark room. How do you feel about ISF calibration? That's seems to be an awful lot of money ($500 last quote). Sincerely appreciate your thoughts on this.