Ray,
I have and still use on occasion, the Maverick 732 dual probe thermometer. When it works, it works well, but I've had too many instances where it loses synch with the receiver even though my smoker is only 50 feet from my bedroom nightstand. So, for expensive meats, I would not trust this setup.
The new iPhone Bluetooth enabled ThermoWorks seems interesting, but again, I bet the range is very limited since Bluetooth is not rated for more than about 30 feet.
What I have since gone to and use with 100% satisfaction is the Auber WSD-1503CPH which is a dual probe temperature controller. I can set it to either shut the heater off or throttle it to a lower temperature once the internal meat temperature is reached. It is extremely versatile and accurate, but more so, super reliable. It will handle 1800 watts which is more than I am using for my homemade smoker with dual hot plates for the heat source. Plus I use it with my sous vide setup that I use to finish large diameter sausages in hot water to control the electric tabletop steamer pan. I can set it to keep the water temp at exactly 160°F and turn off when the IMT reaches 152°F. Again, it works 100% reliably. Here's a link so you can read up on it:
Auber dual probe controller Right now it is not on sale, but they frequently will put it on sale for about 30 dollars less. Just email them if interested and ask when it will be on sale again, they are nice people to work with.
Anyway, I hope I provided some insight. Good luck with whatever you decide.