In the spirit of the tread "No Doubt - I'm Out of Touch", I also have Ultegra 6500. Mine with 9 speed, STI, 12x23 I purchased in early 2000.
I have been thinking of upgrading but torn between current components or going retro for my mid-90"s, I think, Colnago Master Piu frame.
I have ordered a 2018 close out endurance bike as I rehab my hip but have no plans to get rid of the Colnago. the question is upgrade to a similar current Shimano group set that is consistent from bike to bike or do a classic Italian frame justice with a Campy group, retro or current. Nice to hear so much progress has been made with components while I've been away from the sport for 15 years.