Welcome and what a cracking spec. Carbon finishes look very nice indeed.
Assuming you are not too concerned about residuals then you really do have everything and some needed for a great drive.
Assume you are a high mileage driver or another good reason you have gone for diesel as going for a GTS would only be a little more for the same spec but residuals would obviously be much better.
If you are not a high mileage user (consider possible DPF issues) then the fuel costs will be very little difference and residuals on GTS will make up for it on your spec imo.
If you have not already go listen to the standard and Bose audio. I found very little difference.
I always say spec your car for you and enjoy it. Even if it costs a bit more enjoy it 100%
Sport design mirrors are nice to have