If you are getting one receiver, it's probably a 722. The installer will want to place it by the HD set, however it can be set up like your 625 is but you may have problems with the remotes. The easy solution, but you may have to pay more upfront would be a Hopper with 1 Joey. You would probably have to tell Dish you are getting a second HD tv very soon and you would need to pay an additional $17 per month for the receiver fees on top of your subscription. You may have other options, but they may require some rewiring for the receiver and having to adapt the remotes in order to make they work correctly as tv1 with the HD output is IR and tv2 (sd output) is UHF.