I can probably guess that this doesn't apply to you, but if by some chance you are in a 72.5 market that is going to HD locals soon, all of your old equipment will be upgraded to SWM-compliant (not because it is SWM-compliant, because it is MPEG-4 compliant, but all of those are SWM-compliant) at no additional cost to you. I had two SD DVRs and two SD receivers (D10's) that were upgraded to H20's and R22's......I was pretty lucky in this case, although they did not install a SWM dish or module, as the installer said he had never seen one yet! Anyway, like I said, I doubt you're in that kind of market, but if your locals are on the 72.5 dish right now it might be worth a call to see when they are switching over.
Also, if you are a customer in good standing, I would be really surprised if they wouldn't give you some kind of a deal on a receiver, especially if you were willing to lock yourself in for a new programming commitment. When I signed up for mine, they sent me a free HR-21 (charged me $19.99 shipping though) if I would renew my commitment for 2 years, and i can't imagine them not doing something for you.