Your driving a Chevrolet now and questioning about trading up to a BMW. It isn't an apples to apples comparison. The 722 and the HR2X are both dual tuner HDTV DVR receivers that is about the only common points. The Chevrolet is a family car and the BMW is more sports car so they don't compare directly. DISH is "el cheapo" selling concept Directv is more a luxury ride. For DISH you use the poorest quality out put "coax" for the second TV but save $5/mo. For Directv you use a second receiver for the additional TV it is $5 per month more but offers composite/"S" video and even HDTV depending on model chosen. Directv charges 1 DVR fee per account DISH charges for each DVR on the account.
They are different companies with different concepts about watching TV neither is perfect but if your used to DISH don't Expect Directv to be the same company they aren't.


The initial question was not so much about content, but equipment. From an equipment standpoint the 722 is not a BMW, it is more like Ferrari compared to the HR20 which is the Chevy in comparison. When ordering a DVR from D* you will be at the mercy of what is available. My installer told me he has not seen a HR21, yet. His company was receiving refurbished HR20s, only.
Having possessed three DVRs, I came to the same conclusion Cnet.com and its users came to: TiVo and the 722 are both very good, each having features that bested the other. The 722 edges out a slight lead, but is still lacking some key features and does require a little finesse to make it record everything correctly. Both have "point and shoot" features that automate the recording process very well. The HR20 is a work in progress. It is a DVR that requires a lot of user input to record programs correctly.
Before making the switch based on equipment, do read the reviews at Cnet.com. Make time to read the end users reviews. At last count there were nearly 400 reviews on the HR20. Many of those reviews come from field experts who have hands on experience with more than one DVR.
PS. The AMC-14 was a replacement satellite that also served as vehicle for the move to mpeg4, that is, not so much to expand content, but to maintain it.