I have no need for a DVR. Can I sign up as a new customer and only have non dvr receivers in the house? I need 3 units for my 3 tvs. Also If i startup with the lowest package. Can i call within say 24 hours and go to another package without affecting my contract. Or the inverse if I start out at say the top 250 and want to go down to the 190 can I do that in 24 hours or ever without contract issues?