Mike, I had an ET-73 prior to getting my Stoker, once I purchased my Stoker I haven't taken the ET-73 out of the drawer. I have however added an extra food probe to my Stoker setup.
I bought the stoker when I got my smoker and have never felt the need for anything else. I do like the temprature guage in my smoker though for bringing things up to temp before starting the cook.