need some help please?
Here are some prior discussions for thought:

http://forums.corvetteforum.com/c6-c...or-c5-z06.html
http://forums.corvetteforum.com/c6-c...z06-or-c6.html
http://forums.corvetteforum.com/c6-c...vs-c5-z06.html
http://forums.corvetteforum.com/c6-c...z06-or-c6.html
http://forums.corvetteforum.com/c6-c...or-c5-z06.html
http://forums.corvetteforum.com/c6-c...r-base-c6.html
http://forums.corvetteforum.com/c6-c...r-c6-base.html
http://forums.corvetteforum.com/c6-c...nvertible.html





Here are some prior discussions for thought:

http://forums.corvetteforum.com/c6-c...or-c5-z06.html
http://forums.corvetteforum.com/c6-c...z06-or-c6.html
http://forums.corvetteforum.com/c6-c...vs-c5-z06.html
http://forums.corvetteforum.com/c6-c...z06-or-c6.html
http://forums.corvetteforum.com/c6-c...or-c5-z06.html
http://forums.corvetteforum.com/c6-c...r-base-c6.html
http://forums.corvetteforum.com/c6-c...r-c6-base.html
http://forums.corvetteforum.com/c6-c...nvertible.html



OP search is your friend. That topic has been beaten to hell and back here pretty much on a daily basis. We can't decide for you, you have to figure out what you like best.
For example, is a removable top really important to you? If yes, then forget C5 or C6Z.
You really need to think about what YOU want, and what car will meet your needs. They are all great cars IMO, and if I could afford it, I would have one of each of what you mentioned above







