Directv isn't going to install a receiver from solid signal. Period.
Solid signal will send you the HR34, and when you try to activate it through Directv, you will be SOL!
Actually, you can have DirecTV come out to install a receiver that you ordered from SS, however, you will be responsible for the cost of the tech visit, which would probably be $50. That being said, when the tech tries to activate the second HR34 there will be issues.