>>15030253K is a lot to play with.
I'd personally go for TREK emonda ALR 5, the purple flip paint looks fucking sick.
It has the 11-speed 105, miles ahead of your old ultegra and great bang for buck.
The Caad13 is also a new option.
I personally wouldn't ride carbon outside of competitions or serious training rides. I personally know multiple cases where people crashed and trashed their carbon.
Anything above the current gen 105 is a waste of money imho.