Hi Typos,
I think of investing in a humanist sanserif font which I would use as a companion for Minion Pro (among other things), mainly for publications about linguistics. Apart from basic and extended Latin character set I also need Cyrillic and Greek, which limits the possibilities substantially. I am a big fan of Scala Sans (I know, it would be just imitating Bringhurst, but it really is a great font). Scala Sans doesn't include neither Cyrillic nor Greek, however.
Right now my favourite choice is Kievit Pro (I wouldn't know whether to pick Regular or Book as my point of departure, though).
Another option is Stormtype Anselm Sans Pro.
Bringhurst recommends Syntax with Minion - but as far as I can see, the Cyrillic version of Syntax, Paratype Humanist 531, does not include an italic, which is crucial to my needs. And I don't know if there is a Greek version.
Suggestions are welcome!
Cheers,
Thomas