Well, let me see, I have a ET-732,I've had it for a couple years and have never had a problem with it. I also have a Weber Performer with the therm. in the lid, it seems to run about 50* higher than my grill temp, per my ET-732. I do not have a Thermopen, I might get one some day, but really don't neccessarily see a reason for one in my situation right now. I'm not really sure what your application is.....low and slow, hot and fast, grilling etc. For my purposes, the ET-32 works great.
Weber Performer with rotisserie ring, 22.5OTS, Maverick 732, Weber Smokey Joe,PBC Smokenator/Hoovergrill, variety of microbrews, Gin and tonic, variety of lighters.