Those all look like good choices but... I am leaning toward a Bluetooth or Wi-Fi unit. I went from using my phone for a phone, text and some mind numbing games to many helpful and practical uses. Yesterday I set up Active Captain on the GPS map on our boat. It makes it a Wi-Fi spot so I can connect to Garmin, download updates then disconnect from our home router, connect to the boat and load them. no shuffling an SD card back and forth. I also can get notifications from my phone on the GPS screen. Not sure I will set that up.
Back to BBQ thermometers. I rarely cook more than one thing in the smoker so I don't need 4 probes, just one and an ambient temp. Inkbird makes (sells) one https://www.amazon.com/dp/B076QDC5VL?tag=smbbre-20 Getting four probes to start with might be worth it though.