Here is my Cannondale Supersix in a 54.
Not massively changed but the upgrades are as follows;
Wheels - Shimano Ultegra - now need some deep sections!
110mm 3T team arx stem
Fizik Arione versus saddle
Sram S900 carbon crankset and sram red chainrings. 53/39 and 11-25 cassette
Dura Ace 7900 rear derailleur
Not too sure on weight, but it feels pretty light lol.
Next upgrades are possibly Dura Ace brakes and levers. Some carbon deep section wheels and some narrower 3T team bars. I think I could also go -17 on the stem as well as I dont feel low enough when racing.