None of those programs can rip DVDs. You might be able to work with VOB files in Final Cut, but that really doesn't help when trying to work with an encrypted DVD. You'd want to use something like Mac the Ripper to get your files off the disc. Once you have the files, any of those programs should do what you want editing-wise. Final Cut Studio uses DVD Studio Pro to author to DVD. iMovie will export to iDVD, but I personally have had awful experiences with its MPEG2 encoding. Though I may have just been a victim of the default settings.