I had D* for about 10 years and just switched to E* a few months ago. I did it mainly due to there being much more HD content on E* but also because I wasn't happy with D* and their service lately. I referred two people to them, for example, and they always refused the referral fee giving some lame excuse. At that point, I no longer felt the need to be "loyal" to them and moved on to E*. I'm glad I did! Picture quality is better, a lot more HD, and the 622 is (and has been) available while D* twiddled their thumbs on the HR20.
Mike
Mike