If a used HR10 can be purchased now at a reasonable price, and we're reluctant to give up our DirecTivo in the living room, does it make sense to buy an HR10 right now, and ride it out until they're truly obsolete, on the assumption that D* will replace it with whatever the new receiver is at that time? What HD channels will remain HD on the HR10 until then? (I don't even know the current lineup receivable on the HR10, as all our receivers are the old HDVR2's). Being able to record from our OTA HD locals would be a big plus, as D* doesn't offer then in HD yet. Thanks!