How many 2000hp VG30DETT's do you know of? The Corvette has a much better torque curve and has oodles of power potential.
With that said, I'd rather have a Z any day. Everyone and their grandma drives a Corvette or Mustang around here. The Z looks far better inside/out but that's subjective. The only exception is the new Corvette Stingray - I would actually love to own that some day.