you should look at Q1 in the faq regarding the lines after capture.

as for being easier on a dvd recorder in front of the telly that depends on a couple of things.

If you just want a straight transfer from the tape and the recorder has a firewire input, then yes it's easy. however if you wanted to edit the footage, add titles and so on then it's not the best way. the dvd recorder would take your footage and save it as mpeg2 most probably. If you then take that disc and load that into your editor you'll probably going to lose some quality along the way.

Best way is to capture to the pc using firewire, edit your footage and then burn to dvd. all your lines will disappear in the render(see the video faq Q1) and the dvd should look fine.