Tivo was a sister company to direct Tv. Tivo has been dropped from Direct Tv and is no longer offered in there line up. You will soon have to buy a standalone to coinside with your Direct Tv receiver.
But to stick to the main question in this post there two lines of Dish Network equiptment. There is pre 2002 which would be the Lagacy line which is compatiable with all there receivers past to present ,the only down fall is the 1 to 38 switch test which takes some time, but if you buy the same lnb that you have on your house for camping then you don't have to do the switch test.
There newest line is the Dish Pro lnb's which are only compatiable with the 2002 and newer receivers. The lnb's are easy to tell by the large (DP) logo on the front of them. These lnb's only do a 1 to 2 Switch test which takes a lot less time form a installers viewpoint.
I would suggest to stay away from the older dual and single lnb's which require switches inline. Stick with the twins and quad lnb's.
Here is a link to there channel lineup which shows you need both 110 and 119 to receive all dish channels even with American Top 60 Pack.
http://ekb.dbstalk.com/dishlist.htm