it is not true that all OBD port devices would get confused by lean burn. The OBDII C&C, an OBD device that is specifically designed for the first gens Insight and Civic Hybrids has no problem with lean burn. It also shows AFR, though. The Insight is great if you don't need a back seat or carry anything heavy (350 pounds including driver and passenger). It can also run just fine with no hybrid battery, and because of its extreme light weight and lean burn, it will still get killer mileage. plus, with the aluminum frame, you won't have much trouble with rusting (well, the fuel door release on mine likes to rust from lack of use
) If you do, the Civic and Prius are both good choices. The Civic would be a better driver's car with its optional manual if nothing else. You have to take care of the battery though. I built a low power grid charger/balancer based on the designs suggested on Insightcentral.net, and I have no problems with my 13+ year old battery. The Prius is probably more trouble free, but I always got the impression that it is more of a transportation appliance than a car.