I'm designing a fashion magazine on a tight budget. I have Calluna for my body copy, thinking about AW Conqueror Didot for my display. The only piece I can't figure out is a good sans serif. I have attached a sample page PDF so you can see what I'm working with.

Originally I was going to use AW Sans, but it only has the one weight. I'm finding I need more flexibility, being able to use bolds and italics. Does anyone have any suggestions for a sans serif that might fit my needs?

I may just go the obvious route and buy Calluna Sans, but I thought I'd ask for advice before I spent the money.