Im looking around for a new screen at the moment. I have an 8 foot 16:9 screen procinema screen. I use a HTPC with my HT1000 and would be happier to use a 4:3 screen. Why are 4:3 screens home cinema screens less expensive than a similar width 16:9 screen when they use more material. Has anybody used a variable masking system with the pull down screen, if so any tips would be appreciated. V.