[saltman]

If I remember correctly premiere will not use .vob. I know Vegas doesn't. I think DVD Lab is one of the few that does. I would demultiplex the .vob to .m2v and .wav to use. This will NOT cause any degradation of the quality.
Pinnacle has a bad reputation for having poor encoding codecs. maybe that has changed not sure. I know that Vegas and Premiere use the same one Mainconcept, which has the reputation as being the best.