The Z06 sway bars will minimize your car's body roll noticeably when you’re taking hard turns in comparison to what you have now.
To further enhance your handling, the Z06 shocks will compliment your upgraded sways nicely. Go with the '02 to '03 Z06 shocks. You should be able to find them for very cheap, (under $100 for all 4) as many people have upgraded them to the '04 shocks, like I did. Ideally, if you can spend $400 dollars for the '04 Z06 shocks, go with them. I noticed a improvement in the shock's rebound control in comparison to my stock '03 Z06 shocks. I always did find the '03 shocks on the Z 'floaty'.
Now with the '04's on, I'm very content.