Hello everyone, I have a few questions that I know you all can answer. 1) What causes a DVD to stutter? Almost like its stuck then it tries to go - sometimes it goes on, sometimes it just sits there like its on pause, left there long enough it will 'Jump' to another area in the film. I thought maybe a dirty disc but it happens on new discs and even after a good cleaning. Odd thing though is that if I stop it and replay it it wont stick in that point anymore but will usually find another place to do it in. 2)Should I use 5.1 Input to the Receiver or a Coaxial to Receiver for the sound? 3)Right now I have 5.1, I have bookcase speakers for front and back (Klipse). I was thinking about buying 2 other speakers for the back and moving the book case ones to the sides to enable that A+B Speaker thing on the Receiver. Is this a good idea? My theatre room is about 15x30 feet. What sort of speakers should I use for the rear or the sides or does it matter? And lastly Ive picked up alot of great info here already, what is the best Caliberation Disc to get? I saw one poster suggest Avia. Thanks!!