Recently switched from Dish to DirecTV, wondering whether I can use my VIP722 wiht the new service.
The VIP722 is a nice unit, so I'd like to make use of it if possible.
Can it take the place of one of my recently purchased DirecTV HD receivers?
The D* and E* satellite systems are using entirely different transmission systems, so no, your VIP722 won't work. If you want a DVR, you're stuck with whatever D* will provide you, which will be one of the HR2x models.