DigiQ...Maverick...Stoker...

I would add Flame Boss 100 to your consideration list.

Regardless of pit controller I would still get a Maverick 732 or 733.

If you are any kind of a tech geek the Heatermeter gives you the best controller out there IMO.  Google it.

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I think what Michael is trying to say is that he doesn't think much of electronics for the egg ...

You've asked about three units with vastly different capabilities.

The Maverick units simply measure pit and food temps and transmit that data to a receiver close by.  They allow you to go about your business (working or sleeping) at home and will alert you if the temps go astray.  Relatively inexpensive ... $55 to $80.

The DigiQ and the Flame Boss 100 units measure pit and foot temps, but don't transmit that data anyplace ... they do have a temp readout on the units, but that's right by the egg.  Their main strength is that they control the pit temperature so you don't have to tweak the vent settings.  The cost goes up for these units ... $200 to $300.

Many folks (myself included) combine the two units ... one to control the pit temp and one to give a remote reading.  Although they have some aggravating idiosyncrasies, all of the above are relatively easy to program and operate.

The Stoker effectively combines the features of the Maverick and the DigiQ and then doubles down with more features.  It controls the pit temp while monitoring the meat temp.  It connects to your wi/fi for the ability to remotely read and control temps.  While the Maverick, DigiQ, and Flame Boss 100 units read only one pit temp and one food temp, the Stoker is expandable to control and monitor several eggs and a number of food temps on each egg.  With software, the outputs can be plotted to show trend lines during the cook ... can clearly show that you're in a stall and have been for x minutes.  The basic unit is $330 with a number of upgrades available.

The Stoker is not a plug and play unit, but if you're technically savvy it provides hours of nerd entertainment.  Maybe @NPHuskerFL can provide more detail on the Stoker.

EggMax said:

If you are any kind of a tech geek the Heatermeter gives you the best controller out there IMO.  Google it.

Just looked up the HeaterMeter .. very interesting .. I think I might try and build this .. interesting summer project :-)
Some interesting links I found on this:
Forum:  http://tvwbb.com/forumdisplay.php?85-LinkMeter-v2-Homebrew-BBQ-Controller
Kit:  https://www.tindie.com/products/CapnBry/heatermeter-v42-kit/