With the advent of a tuner for our cars there is a lot of interest in wideband A/F gauges. I haven't had much exposure to these and started looking around. Seems there are a few forerunners with different features and configurations. Lots of considerations. Thought it would be nice to have a thread dedicated to the comparison and discussion particular to our cars. Accuracy, configurations, installation considerations, flexibility, standards (like display gauge size), mounting options, features, etc. Some things I would like to learn more about: Some have a separate controller, others the controller is integrated. What are the pros and cons? I assume all the controllers have an output that can feed another display? Installation considerations. Bung with single wire into the cabin? everything else in the cabin. Some can handle and display data from more than one sensor. What other wideband sensors might we be interested in other than A/F? That we don't already have available through the OBDII port? Will any sensor work with any gauge? What are the best sensors? Is that the critical gauge component? Any reason to take the "component" approach to your guage? Like picking sensor, controller, display all from different mfgs? Is a 52mm display going to give you the most flexibility in mounting options? What's your "ideal" gauge and why? Please share. Personally I keep coming back to the PLX DM-100. Seems to be the ultimate in coolness and features.