Or if caching is your biggest priority then Fastly or Akamai will shine too.

But if you're balancing all considerations and want the cheap "good enough" caching with the DDoS protection, free TLS certs, and unmetered (assuming you aren't imgur or something)... then Cloudflare does a great job at being good enough. And for those sharp edges... drop in a proxy of your own, or layer your CDNs.