Originally Posted by MinnMan

Luckily, we are NOT your only hope.

There are lots of great bikes out there for $2k, but if you're sold on DI2, I don't think there are many store-sold brands that sell CF+DI2 at that price point.

If your experience is limited to your old 720 and your friend's DI2 bike, go to your LBS and ride a road bike near $2k and see what you think. Maybe the DI2 is essential to your aspirations, or maybe a modern mechanical drive train is, for you, almost as sweet.

More generally, going to do some test rides will probably be more educational the the cacophony of answers you'll get here (although sadly, you can't test ride a BD bike, I don't think). If you ask people here about the "durability" of CF, you are going to get the full gamut of answers, from "I've ridden the same carbon bike 15,000 miles/year for 12 years with no problems" to "crabon asplodes"