Yeah, fair point on the R8000 crank issues! From what I have read, Shimano is doing the right thing and replacing them with few questions asked. That said, I agree that they are ugly!

Ultegra 6500 and Dura Ace 7700 are easy to find on eBay. Not seeing as much on eBay for Campagnolo. Is that the best place to find a used groupset for this frame?