I just bought a 2021 LT1 and traveled 3 hrs to get it b/c a dealership had the exact options I wanted (and one that wasn't a must have, but nice to have).
Mine are:
Must haves:
A10
NPP
Technology package (bigger screen and comes with a little better sound system, which doesn't really matter to me.. but bigger screen was a must have)
Satin Metallic color
Split spoke wheels
Lip Spoiler (came with the RS package my car has but you can add separately)
Nice to have:
RS package (this seems to be a little pricey for what it is, I like everything it comes with.. but still a little on the pricey side for this option to me)
Now if I could just find someone with the rear wheel SS split spoke wheels that would like to let them go at a reasonable price..