The very nature of the kind of content you're serving over a CDN seems to indicate that unless you're extremely high traffic, the benefits are few: most of your clients are going to grab the static content from you once at a cost of a few hundred extra ms, and then rarely need it again.

I think having CDN as a basic requirement for all projects is... ill-considered. Remember, using a CDN is giving away data about your users' browsing practices without their consent.