It sounds good in theory, but I have been searching for a Z06 every day for 3 months. They are NOT available for anywhere close to what I paid for my GTO.
I found 1 2001 Z06 in Ohio for under $29,000. It was in Johnstown, with 60k miles, and was completely dogged out. There are a few in Cbus now for 29-30.
My car was $9,000 less, and is almost spotless. After driving a few LS1 Z06's and a GTO (GASP), I would still pick the GTO. If I was 10 years younger, I might have a different opinion.
EDIT - Also, whoever drove the 04 6 speeds for the 1/4 tests from the major Car magazines, should NEVER be allowed to do a test drive again. These cars are faster than advertised. That's one more huge reason I like it.