Agree chorus is Campy's best deal going as far as their whole gruppos goes. The veloce brifters are essentially disposable. They can be "re-cored" but that one part costs about as much as a whole new set with fresh cables. The chorus on up brifters can be rebulit.
Though, on the budget end there is quite a bit to be said for Veloce pulling an Ultegra RD. It really is a sweet combination for the amount of $'s involved. Ultegra RD's really aren't tangibly outperformed by anything.
The real deals right about now are some of the higher end 10 speed wheelsets, since everything is going 11 speed. Buy a 10 speed wheelset for your 8 speed cassette, then add in the ultegra RD and veloce brifters and you have a real freshening up of a nice 80's steel ride.