Why is Turabian not a Style option?
My school requires that we follow Turabian, 7th edition, but it is not an option on Zotero, so we use Chicago Manual of Style Full NOte with Bibliography instead (I know that Turabian follows CMS, but there are likely small differences that I will need to go back and check after everything is in CMS style, to make sure it matches with Turabian).
http://www.zotero.org/styles
but for what it's worth I think I remember that there actually are no differences between CMS Full Note and Turabian.