I'll jump in on this one. I believe if you are planning to keep and ride a restored vintage bike, you should be as accurate as possible. That is to say, you can have the look and..... the luxury of modern upgrades. I personally have chrippled hands, so you will notice I used bar-end shifters on my Paganini Mistral (they ARE Campy). I also used a Campy Chorus Groupo with a 9spd crank and derailleurs. She's set-up with a 7spd rear cassette but I will have a new Miche Shimano set on the Friday. I hae a 10spd chain on now and it shifts like butter even as a 7spd. Opps, you caught the Shimano part.
Yes, I chose because of the availability of cog combinations. The rims are Mavic Open Pros, they're slick.
The 10 spd shifters are bieng used in the "friction" mode. If you are restoring for your own stable, then by all means, be period correct and enjoy your work. Either way, it will give you and others who see your bike great pleasure! If I retire my Paganini, it will be returned to period correct. I don't believe I'll ever retire it!
Ride on and take time to enjoy the view. Tim