I recently purchased the RCA MM5200 and now considering getting the DTC-100. I would love the group's input on the following: 1) The DTC-100 will be used primarily to capture OTA HDTV signals from Boston. Can I use the old antenna on my roof already? Just how important is it to get a new HDTV antenna? 2) I have read that the DTC-100 will convert regular TV broadcast to a progressive scan image. Can I run my DVD player through it to produce a progressive scan DVD image? Is there anything else I should know about the DTC-100? Thanks for any and all input!