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.