Funny thing, Stan at benchmark got back to me about which option I would like so he can give me pricing, I responded back with my options but didn't hear back from him again. Emailed him a second time but still no respond.
I agree with 500 hp for the Zs unless you're going drag racing. Majority of the gt1 cars these days are about 500hp, like Japanese GT500 cars. I'm myself looking about 550 to the wheels with 305 tires.