In your other thread, you identify your material as HDV. If you go the DVD route, you will be downrezzing, whether using the MPEG2-DVD export or DL. Use an upscaling player and you will get your best quality. If the player they are using is DVD, you have no choice but to downrez.
Or use a bluray disk and player. Export to H264-bluray.
Same authoring workflow: create timeline in Encore, end action on timeline to itself. Burn to BD-R. See if that gives you what you want.