You know the first gen Z/28 only had a 302. But it was a pretty awesome motor with low displacement. Now I don't know if the current V6 is capable of accepting aftermarket dual-turbo's but if it did, I would consider it. For me its not about number of cylinders. Its about performance plain and simple, and I don't really care how they get there. The original Z/28 had some pretty radical ideas for its day, I think GM would do well to go back to some similar ideas with today's technology.
Having said all that...I'm really hoping a 550 HP version is offerend right away.
