Id take a nice lobby card over a US 1 Sheet (or anything larger) - values aside.
most days I wish I ONLY had lobby cards, so easy to handle, display, store.
I love all my flip books of cards, I can use them as a
table book and enjoy. Posters, if they aren't framed, I can only enjoy for short amounts of time, every now and then.
And theres plenty of good art only title cards around. AND they are affordable in comparison.
If some evil god didn't invent Daybills, Id say my favourite format.