I agree completely with Brian.

With good HDV, you can crop and pan in post. You can simulate a camera move, or a zoom, in post that was not actually performed while shooting. As long as the final product is a SD DVD, then the resulting footage can be very nice.

If you want to compare stills, interlaced can't compare to 720p.

...Because your DVX100a image will look like it came from a freakin' webcam after you see the HDV footage!