i recently purchased this panasonic th42pa20, it is edtv, my question is... if i order hdtv programming through time warner is it going to make a significant difference in picture quality because i only have basic cable right now so the picture is pretty bad. my other question is if it's even worth me upgrading to using dvi to dvd because i know that the plasma only puts out 480. [ i think? ] sorry for the questions i am new to all this..