1. ConvertxtoDVD:
Great for inserting .srt files (WinAVI cant). Not a great batch converter, as it asumes you want to stuff them all (say Friends Season 1 episodes) onto 1 disk. You have to fiddle and remove episodes till the thingey at the bottom says "conversion quality excelent."
2. WinAVI Video converter:
Great for batch converting if you don't mind an episode or movie "spilling over" onto the next DVD. Burn is the same quality as ConvertxtoDVD.