I think I made a big mistake not getting 2 DVR's.
I had the same second thoughts after my order and ended up calling in and paying the $99 to have a second HD DVR added to my order (going from a 722k and a 722 to 3 tuners was a bridge too far, even with Whole Home DVR service.)
They have yet to do the install, so it was just a matter of removing my order from the system and then re-entering it with the second DVR in place of the standard HD receiver..
So I called, and soon thought I was in the twilight zone.
Me: Can you see my order?
Rep: Yes.
Me: I want that exact order, but instead of the standard HD receiver for my second receiver, I'd like an HD DVR receiver as my second receiver. So, two HD DVR receivers on my account for a total of two receivers. I have my credit card on hand to pay the $99 upgrade fee.
Forty-five minutes later...they didn't know about DNS channels out of New York -- that they existed; they didn't think I needed the AM21 --actually first they didn't know what it is and then they said I shouldn't get it-- even though I wanted it to pick up the channels I can't get via DNS; my bill was $10 higher a month for the same channels; finally my credit card "didn't have funds" until I read the card number back again, very, very, very, very slowly...)
I got the feeling the representative was a trainee as she keep going to mute (rather than hold.) I assumed she was "Y-jacked" in with someone else.
The good news is after all of that and the sounds of frustration seeping out of my generally calm phone demeanor, I got an additional $5 off per month for 24 months from my initial package, which pays for the upgrade in the long run.
Of course, this experience was no different than dealing with Dish so I'll just call it par for the course and I am hopeful that once the installation is complete I'll be able to do the majority of my interaction with D* online. I just prefer it that way across the board. Having worked in the call center industry years back, I know first hand that CSR Roulette is a necessary evil in that with any given room of agents, 25% are going to be awesome, 50% are going to be average and 25% or going to make you wish you got the other 75% on the first call.