I rather roll in a Z06 than a GTR.
I've owned 2 C6 Corvettes. They are great cars. I considered a Z06 before I bought the GT-R. I found an 08 with 15k miles for $42,000. They have horrible resale value.
The Z06 is starting to look dated to me though... To make them fast you have to make them loud and stinky. They are also two wheel drive and it's near imposable to put all that power to the ground in 1st or 2nd.
I'm sick of high HP rear wheel drive cars. All wheel drive is where it's at. My GT-R will rip your face off in 1st and 2nd on the street. I can take 90 degree turns and just hammer it half way through and the car will just stick like glue.
I can't think of any car I would rather have hold a 458 and R8 V10 over the GT-R.
P.S.
BATMANs - Have you owned a C6 corvette or a GT-R? Have you driven a Z06 or GT-R? If not, maybe you should keep your 2 cents to yourself.