Good solid analysis, Fraxum. I think it would bother me if I didn't get the Z51 too.
And since you're in Z51 territory, you may want to take a look at a new Viper. I don't know if your budget can go this high, but there have been some amazing deals out there on the 2013s on the lot, as low as $85K (usually closer to $90 to $95K for the base model, which kicks ass). There is nothing like 640 HP and 600 Ft Lbs in a 3300 pound beast. I own one, worship it, love it. I'm tracking it at Willow Springs this weekend with about 10 other Vipers. I think maybe my Camaro is faster on the track than the Viper though, with my humungous wing and splitter, LOL. I'll find out this weekend. I also like the new Vettes, but I would personally hold out for a Z06. That is going to be one mean machine.