The price difference between the 2LT and 3LT weren't worth it IMO.
I went with the 2LT and got the navigation.
I had magnetic ride in my ZL1 and will NEVER be without it.
I may never need the Z51 options with the magnetic ride cuz I doubt I'll ever race my C7, but I love the smooth ride the magnetic ride gives and I'd rather have it all and not need it than need it and not have it.