what is important to you?? wireless so you can see what is going on from inside?? I love thermoworks products and I actually like their handheld for the restaurant over the thermopen, but I have several of each.
That said, if you are not looking for a monitor, I would first get a couple cheap poulder style and see how I use them. They can be picked up from Costco Business for 15 bucks each. I would get a good thermo from Thermoworks (thermopen pr handheld with a k probe) and make sure you get the fast read point.