Hi Angela, you must have both. If the TV can display in progressive scan, then the DVD player must send the signal in progressive form in the first place, otherwise you will be watching movies with the built in line doubler, which is not too shabby, but not nearly as good as progressive scan. The TV's line doubler does help with analogue feeds (cable, antennae, VCR, etc.) but all progressive scanning is not equal either. You should look for a DVD player that does 3:2 pulldown. Film runs at 24 fps and video at 30fps and progressive scan is the best method of compensating for the difference available to us. My Pioneer DV-37 does this very well, and is reasonably priced. The new Sony DVP-9000ES does this as well and adds SACD playback. Some new players by Toshiba are available with 3:2 pulldown, but I am not familiar with them. Progressive scan was more than half the reason I upgraded from my Toshiba TW40F80 (non HDTV, non progressive scan) to the TX40X81 which has both features. Hope this helps a bit.
