TL/DR; It depends on what you want to get out of the car. Figure that out, and decide whether the Camaro meets that, or whether you're just momentarily bored and looking for something to satiate that boredem.
I sold my Camaro in March 2013 and stepped into an M3 - arguably a car with a more well-rounded sports car experience, and certainly more "exotic" in a sense. While the M3 didn't have the straight line speed my Camaro had, it was no slouch and it definitely would come out on top in a cornering exercise. In the end though, after 6 months and 5k miles, I decided the M3 wasn't for me and traded it in on a 1/2 ton.
Do I regret selling the Camaro for the M3?...No, as it was a good experience and I learned that a small two-door German sports car, at least for me, isn't an option for a daily. I'd take one as a second car, though.
Do I regret getting rid of the M3?...Not for a second. The German made sports cars are definitely an experience. I don't know what your financial situation is like, but owning a German is not exactly...economical. And when you're stepping into a R8, it will be an even larger jump from a domestic.
In the end, no one can answer your question for you. We can only provide our experiences and our thoughts during the process. Decide what it is you want to get out of your sports car. Does the Camaro fit that, or are you just bored? Will you get bored with the R8, and find yourself in the same situation a year later? Changing cars frequently can be a slippery slope if unchecked - ask me how I know, as I'm considering trading the 1/2 ton in on a 3/4 ton diesel after only a year of ownership.
