Dish HD Installation - Need confirmation

I've currently got a Dish 500 setup with a Dish DVR 501 (single-tuner). I will be moving soon and want to add HD Dish with a dual-tuner HD DVR. I am in the Salt Lake City area in Utah and I was told I would be getting a Dish 1000 satellite setup. Is this correct?

Next I was told I could just hook one line into port 1 on the DPP LNB (will it come with a DPP LNB??), have that line feed into the SAT side of a diplexer, and have the cable line feed into the ANT/Cable side of the diplexer. Then I could hook that into the one line going into the apartment. Then I use the diplexer inside the home to split the satellite and cable lines. Then the satellite lines will go into the separator and then into the HD DVR. That way I could get cable and 2 satellite feeds in one line.

Is all this correct? And does the dual-tuner DVR come with a separator? I just need some confirmation before I pull the trigger on this.