Any reasonably priced line doublers?

No, they only work on tv's with a high definition capability.--Able to scan at the higher rate. Regular non hi def scan rate is 15.5 Hi def scan rate is 31.-- This applies to progressive scan dvd players also--reg tvs need not apply.Run the dvd,or sat. box cable, direct to your tv. Use as high a quality cable as you can.--Such as the Monster M2000 s- cable--available on the site(buy2;get one free)

I have had great results with the DVDO iScan Pro. I feed the satelite, DVD and VCR through it and the results are much improved. Silicon Image also offers a less expensive model (I think it is the iScan Plus V2).

You will need a HDTV capable of handling a 480p signal.

Thanks guys. I guess I need to hold off on this idea until I get an HDTV model. Currently I have a Mitsubishi 35" direct view tube TV. I have it connected to satellite and DVD with the new Tara Labs RSC S-video cables. The picture is beautiful, especially with a monthly tweaking using the Video Essentials DVD. It's just that on occasion I can see some barely visible lines when the picture contains a higher white level to it. No one else notices but me.......