Questions about upgrading to a 721 receiver

[mlinuxg]

I currently have a 5000 receiver with a Dish500 dish. I want to upgrade to a dual tuner DVR to take advantage of the DP+44 switch so I don't have to run another line into my house.

Am I correct in thinking that I need to purchase the following items to be able to feed both tuners from a single line.

1. DP+44 switch
2. DisphPro Twin LNBF
3. 721 receiver
4. DishPro Plus seperator

Is there anything else that I need?

Mike