I've previously published a book typeset in Palatino. Examples in the book were presented as an italic in greyed boxes. I'm considering revising the book for a second edition, and among other changes I am using the more readable (and to me, visually interesting) Aldus. I'd also like to ditch the italic in favor of a sans serif, but am unsure what pairs well with this typeface. Any recommendations? (Likewise, any reservations against mixing sans serif and serif in this fashion?)