I like lid thermometers on any and all of my grills/smokers. I don't trust them for accuracy, but at a glance I can see if the temp has gotten out of control.
I would not want to pay more for a higher quality thermometer. If I want accurate temps I'll use a probe. If a lid thermometer is within 25F or 50F +/- when compared to an ambient probe that's close enough for me.
My BGE has a Tel-Tru; the original from 2011 and still works great. It is very accurate and tracks within a degree or two of a thermoworks smoke probe. These run about $40 to replace. I would not invest this much to upgrade the thermometer on the 1000, E330, WSK or the performer kettle.