My experience is similar to Marks
However, in addition, I similarly record HDV downconverted as DV ( in-camera) to Settop DVD recorder via a DV input if the material doentneed much ( or any editing.
However, I do sometimes Reimport the DVD made from the settop to PC for the purposes of authoring a DVD with Better Menu and maybe additional material like a slideshow or PC intro.
So I can get a DVD from
1)Direct recording to Settop
2)Capture to PC from Camcorder
3)PC based from Settop DVD
Because the DVD authoring Software tends not to re eencode DVD ready mpegs
The real world difference in all of the above the Outputtted DVDs is very slim even though with more attention to detail ( re: encoding bitrates) the Direct PC output has marginally better IQ