If you want the best of both performance and mileage on a mild to moderate engine, the Thermoquad is tough to beat. It comes with a learning curve, though.
Can agree with that , had a thermoqaucker 850 on my Dart in the 70's , best carb ever !! Great gas mileage around the city , and watch out when it opens up ! But like you said learning curve , and find a good one these days is hard .