If you don't mind me asking why are you wasting your time, resources and storage on DVD reencoding at this day and age? We are in HD era, just get amazing quality x264 1080p or 720p bluray encodes. You seem to be dwelling in the past with your DVDs.
C2D E6750 @ 3.2Ghz, 4GB 800MHz DDR2 4-4-4-12, GeForce GTX 260 c216 OC 896MB, 3.2TB, Windows 7 Ultimate x64
Xbox 360 Elite, PS2 Slim, Xbox