I prefer a vintage looking frame with modern components. Indexed shifting and dual pivot brakes are the biggest improvements ever made in cycling.
I can do without either. I used Dura-Ace SIS for a while when it first came out, but eventually reverted to Simplex retrofriction levers and Huret Jubilee derailleurs. I don't have any issues with my single pivot brakes that would lead me to replace them.
OTOH, modern clipless pedals *ARE* a nice innovation. Anyone else remember using the Cinelli M71 "Widowmakers?"