We're the ones that made that video months back, this is a great topic.
After owning my car, I'd say the best value combination is the performance exhaust + 2LT. With 2LT you get all the tech stuff included and with the perf exhaust, you're getting a better sound from your car as well as all the REAL performance that Z51 would give you (minus the brakes). The exhaust itself is what gives the car 5 extra horses and torque and makes the car launch to 0-60 in 2.7-2.8 seconds.. not all the "downforce" and "added cooling". After seeing the car in all three spoiler variations (no wing, Z51 spoiler, and high wing), I'd say Z51 is the worst looking. It breaks the cars natural body lines and makes the back end more messy for no good reason.
But if you have $800k + in the bank with a fully paid off house, why not go all out with a Z51 3LT with carbon fiber? What you chose depends entirely on your own financials. There's really no bad decision here, the car is just plain awesome for the price.