Hi there Heidi and thats for joining in!
I've heard China Asters are supposed to be great for cutting, also annual Baby's Breath, Celosia are great fresh or dried and Strawflowers are great dried.
Theres also annual Carnations, and some great Dahlia types from seed too!
Oh! And don't forget Sweet Peas ('Cupani' was a great variety for me. very easy) and Annual Poppies too. Just be sure to sear the cut end of the poppy stems with a flame before putting in water.
Steven