Here's the prototype for the next Mazda 6:
And, it will feature Mazda's new skyactive engine technology that features a very high compression ratio like a diesel. Skyactive will deliver very good mileage as well as performance. A car worth waiting for.
I support the CAFE requirements - they are in the best interest of our nation and the environment. CAFE requirements encourage manufacturers to build aerodynamic car bodies but, even with that requirement, it is possible to build exciting looking cars. The temptation to buy a Camry is great - it's a high quality product.
Enjoy the Viper while you can. I doubt the next one will have a 10 cylinder engine. I really like the new Scion / Subaru twins and the Hyundai Genesis Coupe! I would buy a VW CC anyday - especially with a diesel engine!