All this talk has just got me too excited and now I might just give in and get the ZL585, it's supercharged and still has the 5yr warranty. I don't know if I can wait another year+... If the Z28 was going to have 600hp or something else amazing I might try and wait but it's getting too difficult
http://slpcamaro.com/zl-models/zl550-zl575/