I may be considering a DVD recorder as my next home theater purchase. However, my knowledge in that area is limited at best. So several questions spring to mind - are DVD recorders able to record dolby digital 5.1 sound if the source (say a movie channel) is airing a movie with 5.1 sound? Also, should I use DVD+R or DVD+RW disks; and what is the maximum number of recordable hours per disk? Will the picture quality be as good as the original source? Thanks for your input.