I bought my 2nd bike, because after 3 years on my aluminum/carbon fork bike, I was ready for all carbon and Di2 internal cable system. The weight difference is humongous from an aluminum bike vs. an all carbon bike. I was smitten the minute I lifted the Cannondale SuperSix Evo from the shop floor and it weighed like nothing.
If I had the money, my 3rd bike would be a more endurance geometry bike that can fit 28 or wider tires, disk brakes, and SRAM Red eTap. Also, it’s gotta have some European sounding badness, like Pinarello or Colnago. I make an exception for Canyon though.