Hello all. I have a 65 inch RPTV. Toshiba. I have a progresive scan DVD, DBS, and a VCR. I want to improve the resolution of everything to take advantage of the 1080i or 720p that my TV can do. So here is my question. What would be better to add, a line scaler or a line doubler. I have heard different things about these items. a. doubler increases resolution and scaler only makes low res images viewable on high res displays b. doubler doubles resolution and scaler increases resolution up to native rate of display. (making the scaler the obvious choice) Please tell me which (if either) is correct and which one would give me the best performance on my TV. Thanks, craig.