Older PT need a special (i.e. expensive) tool to remove cranks, latest are self extracting. UT is straightforward. UT, which is usually on the higher end kit, allows rider to sweep across a number of sprockets, PT is one click at a time. All Campag stuff needs Campag shaped tools and consumables, but not especially expensive ones. I would avoid Veloce, preferably go for Potenza or above. AFAIK, Potenza and below are made in Romania, Chorus & Record in Italy. My Chorus levers and mechs are perhaps due for a service after +20 years of solid use, but that's usually a specialist job.
I use Tifosi BB (Square taper is different to Shimano taper). Cartridge is fine, lasts for ages and no maintenance.