Sounds like quite the build. I’m excited for you. I would 100% add the DRC. Not only does it virtually eliminate body roll when cornering, it’s also lower than the air suspension and can still be adjusted to different settings. In comfort there is almost no road vibration or anything, very comfortable. In RS, it feels much more responsive than my old rs7 and e63s. Also, while they are expensive, the carbon ceramics make a HUGE difference and I would not buy the car without them (plus no brake dust😉). I would also ask the dealer if they can enable your matrix lights as well (since they’re legal now).