I have one HD TV, and 3 SD TVs. I have been reading post on here for the last 5 months, and I am trying to decide if it is time to switch from cable to Dish Network? I am thinking of getting the Platnum HD lineup, with an HD DVR. Is now a good time to jump in, or should I wait due to new technology coming out? MPEG2 vs MPEG4? I really don't know what either of these mean!!!!