Update#2. Thanks to my DA and the great folks at the Scottsdale Delivery Center, I picked up my Zenith Red Grand Touring on Wed 6/22. They had to void my previous signed purchase documents as they were too old, and I signed new ones.
All other cars ready for delivery at that center were under wraps so I didn't get to see any Quantum Grey, but I am extremely happy with my switch to Zenith Red. It is amazing in person.
I took it to my local detailer for a paint correction/ceramic coating quote and he was quite surprised at the finish quality as well-- he didn't think it would really need very much correction.