Being able to afford any bike part might not be that uncommon in this age group, but I do not believe some of the choices are worth it. I really like Ultegra, and do not see any reason to buy Dura Ace. But, I am not a road bike guy by nature. As I wrote above, I do not know if I would go full XTR. Having an all matching group is not that important to me. I would only buy Campy if building an Italian bike. So, the extra work or extra money is not changing that for me. I try to pick by what is likely to max out my enjoyment and not be a waste.