Front Mount Turbos are the most efficient and best performing. Their boost delivery is NOT RPM dependent.
BUT, they are significantly more complicated and expensive than a belt driven supercharger.
ECS has perected centri systems and deliver low end power, But, the TVS 2300 from the ZR1 seems like a no-brainer for a Camaro/G8 that sees track time.
If you want to best, and you have the money, go twins.
I highly recommend reaching out to Turbo Technologies in Washington state if you want a twin turbo for your Camaro or G8. The TTi-X system is the best TT available for the Corvette. I don't even want to discuss the shady characters at APS and their history. (Dave Inall)