Hi
It was towards the top end of the Campag range at the time, with only Croce D'aune and Record above it. I have a bike with the Groupset on, and it looks and works great. The brakes are monoplanar and are second only in looks to Delta (my opinion obviously). The rear mech I don't like as much, but it's part of the group so hey ho!!
You should be able to build it up with Chorus relatively cheaply, but the brake calipers may take a while to get at the right price.
Matt