Hang on, you want the best quality?
Capture & edit in 4:3, make a 4:3 asset in DVDSP
You can edit in 16:9, so capture in 4:3, edit in a 16:9 timeline and readjust the clips so you don’t cut anybodys head off etc. Then make the exported movie of this timeline a 16:9 asset in DVDSP
Now the problem is that if somebody watches in 4:3 they will be looking at a cutout of a cutout and the picture quality won’t be that great 🙂