I would keep dailying the C5 to be honest. My friend had one with 480000 kms. It really never gave him problems. He drove it all through our shitty winters. The car was great.
Honestly myself I would not want my daily to be the same car as my weekend toy. I know the LT1 is cool and all but...... I don’t know that I would enjoy the ZL1 as much as normal when every day I’m driving a Camaro anyhow. You’ll appreciate the ZLE much more when you hit the pedal on the right that’s for sure.