You really can't go wrong with the ET-73, although they could increase the range a little. An interesting point, I used 2 ET-73 this weekend, to make 50lbs of Lebanon Bologna. You can use 2 of these without cross interference. THus I could read 3 internal temps and the smokehouse temps independely. I think they might use many sets of different frequencies, thus if you get two, and they are on different frequencies, you can run them without cross interference.
By the way the Bologna turned out great,