I own an Argento Vivo and ride it at least once a week. I think I prefer it to my mb1, but it's a very close thing.
There was also a red one, I think called an Ottomillia, which was the same frame as the argento vivo but a step up in component spec, positioned between the av and the next machine. I actually thought (and still do) that the next machine was kind of ugly; love the flat black and the campy spec, hate the e-stay. I bought the av as the extra $ for the otto wasn't happening for me at the time.
I've broken the frame twice. It was sent to Trek for repair under lifetime warranty, an obligation they graciously accepted having bought Fisher. After the last repair it came back repainted silver with Fisher stickers and a glue-on Trek headbadge.
I think I've broken and replaced every part on it except the brake arms (dia-compe 986, still, in mho, the best cantis ever made and just as good as v-brakes when properly set up) and seat post clamp (which says "Cinelli" on it, the only evidence of the bike's origin).