Thanks for your definition. It's what I was hoping you'd say.
Whatever program you choose to do your catalogue, it shouldn't make any difference to it whether you are listing individual (rather large) single VOB files, each one representing one film, or one major folder, representing all your movies, with individual sub-folders (each one representing one movie), with each of those movie folders further sub-divided into AUDIO_TS and VIDEO_TS folders (the same as your DVDs).
The only limiting factor there will be the program you use to play the films and display them on your TV.
A software DVD Player (such as Cyberlink, WinDVD, or somesuch), with a hardware output to your TV, will allow you to retain the original DVD file structure - and reduce the time and work you have to do to get it computer-ready.
The choice of cataloguing program is a pretty subjective one... and I'm not set up the way you are, and do my library differently, so I have no specific recommendation... just make sure your choice will allow the playing of catalogued items (or redirecting to a player) on your computer.
Others on this forum may do their library in a way similar to yours, and may have more specific ideas for you.