I think that compressor is the way for you to go.
Compressor uses Shakes optical flow technology and does a very smooth 30 to 24P conversion. I did extensive testing of this workflow for a 24P project that had 59.94 footage in it. This produced the best results
I would
1. Dub to DVCpro50 30i
2. Capture
3. Createa acompressor setup that converts 30 to 24 at highest quality.
4. Batch render the movies to the codec you are editing in.
5. Import and edit
The resuting movies are like you camera tapes and will be seemlessly integrated. You could even do all of your 4×3 to anamorphic cropping convert to anamorphic if you wanted to.
David