i have hundreds of vhs that are 6-8 hours per tape, and i am converting them to dvd at a 1 dvd per 1 tape ratio. my concern is with quality. i had a vhs/dvd-in-one recording unit, but it gave me a/v sync problems, so i returned it, and was recommended to go through the computer with this process. i already have the capability to capture vhs video and burn it to dvd on my computer. my question: why is it that when recording EP/SLP mode with a standalone dvd recording unit plugged into the television, that i can fit about 6 hours on a single layer disc at pretty decent quality; but recording/burning in EP/SLP mode through the computer produces a poorer-quality disc with less content? it doesn't make sense to me!