Which Groupset?

Campag is great, it’s best
Campag is great, it’s best not to mix parts but it isn’t a problem to go all Campag anyway. You’ll need some tools if you intend to do your own maintenance. Campag bottom brackets require a special tool to remove, either buy one or get your LBS to do it. The pin is fiddly to fit on Campag own brand chains. You don’t need the expensive Campag chain tool to do it but not all chain tools will be able to fit the pin. You can always use a KMC link or a KMC chain if you want to or get your LBS to fit the chain. Campag cassettes have a different spline pattern so you will need to change your freehub body if you want to reuse a pair of Shimano compatible wheels or else get a Ambrosio cassette with Campag sprockets and Shimano spline pattern. Ideally, you would buy a nice new set of Campag hoops to adorn your new bike. There is no dark art to fitting a Campag groupset, it’s all simple enough and there are plenty of video guides on the web. I’ve ridden Campag for four years and I did my first Campag build in the summer. It took me two sessions to complete and has worked like a dream ever since. It’s my favourite groupset but these things are purely personal, all three major brands do a grand job once you get past a certain price point.