So I had my dish replaced today to address an issue with my HD channels dropping out and my 103c signals dropping to 0. The new dish and new Bband converters did not help. So I called and got them to send out a replacement HDDVR under the protection plan. I tried to get them to sell me the AM21, but because they don't know what box I'll get they won't sell it to me until I receive it. I was annoyed because I highly doubt I will get an HR20 and from what I have read the AM21 works with the HR21, 22, and 23 units. (please correct me if I am wrong). I tried explaining this to no avail. Now my question. There are several sites where I can order an AM21 on my own. I know it's a bit more expensive. But other than that, is there any downside to me just ordering on my own rather than waiting for the box to come and then having to deal with support again? I'd gladly pay $20 extra to avoid another call to support, and who knows if that will go well. So again, if I just order the AM21 on my own, is there a downside? Will I still be able to use it even though I didn't purchase directly from Directv? Is there a retailer anyone has had a good experience with? Thanks for your help?