Had a question regarding receivers. I have been with D* now back again for 2 1/2 years. Was gone for a couple of years when I moved and before with them 6 years. I want to upgrade one of my SD receivers to an HD receiver (not a DVR, already got 3 of those). Since I have been with D* over 2 years would now be committed for another 2 years? Do they charge for an upgrade? Would it make sense to just buy one of eBay and activate it? Thanks.