best quicktime export settings - compression - from final cut pro

i have done this for a while. still don't know.

to translate an ntsc 24p project onto a dvd, which export settings (compressor)do you use in final cut pro? i use current settings, and once i am done with idvd ("best quality") it just doesn't look high quality. is this an idvd question?

powermac g5 2.7 ghz dual Mac OS X (10.4) 2.5 gb ram