I agree with what "Mr. Satellite" has said....the HR24 or H24 receiver will work with the single LNA/LNB round Dish(Domed Sat) now and when the change over takes place BUT try to get Direct to supply you with those particular receivers! I did, talking with roughly 10 different Reps and about 5-6 supervisors. Yes, you can buy these receivers BUT then play Hell getting a bought receiver activated. And even after you do all this, you will be at the mercy of Direct TV as to what they decide to put on the HD 101 Satellite. I Got tired of all the BS, fighting to keep what will amount to a less than prefect system.
After well over 20 years with Direct, they have lost me as a customer....I know, I know, don't let the door hit me on the way out, but that's OK...they can do without me as well as I can do with them.