I am in the process of switching from D* to E* too, so most of your questions, I can't really answer. But i've been doing a lot of research and I can maybe answer a question or twoFreeBaGeL said:
1. I am asking the same question as I have tree problems around me right now and I'm suspecting that the locals won't come down off the satellite as that 'bird' is at an angle behind a tree, and what i was told by my dish rep was it would be best to get my own antenna from some places like Radio Shack. I asked if they would hook up the antenna and was told they would, however, as with DTV, I'm expecting to have to pay the installer extra and direct for that, as that would be out of their regular area of responsibility.
2. As far as removing the dish, I can't really answer that too much except to say that when I moved from my apartment to my new home, I had to pull down my dish from DTV from my patio. I was forced by my apartment complex to mount my dish on the patio and on a pole so the installer screwed the pole into the wood on my patio. The only things left were the holes.
4. Right now if you get an HD-DVR, you pay the $200, but you get a 'rebate' of sorts. It comes in the form of a $20 credit on your bill over the next 10 months. And FYI...DTV does the same thing now as far as charging for an upgrade and still lease. I find that stupid, but evidently that's how both are doing now too.
Hope this helps
Bruce