hello, i've been backing up dvd's for a while. recently, i switched to sony DVD/+RW and the last few movies on main movie mode only (beowulf, rendition, the brave one) have all failed. I can understand one dvd being bad, but i've wased nearly 10 sony dvd +R. dvd fab burns it successfuly, but when i try to play it on my dvd player, it says error or dirty disc? i tried using tdk +R on beowulf, and it worked perfectly, it was faster too.. I though sony's were suppose to be good? what brand of media seems to be the best?