I'm looking into using ECDHE-ECDSA and there are a lot of great articles on why (https://hynek.me/articles/hardening-your-web-servers-ssl-ciphers/) and (http://blog.cloudflare.com/ecdsa-the-digital-signature-algorithm-of-a-better-internet), for example.
Obviously the browser support isn't great, but Chrome 30, Internet Explorer 11 on Windows 8, Safari 7 on OS X 10.9, and Firefox 26 all support TLS 1.2.
I have looked into a few CAs and only a few sign certificates for ECDSA (Verisign/Symantec does). My question is: if I get a certificate signed for ECDSA and in my cipher chain I fall back properly, will older browsers be able to use RSA?
I have the feeling that the answer is no, because if you sign an RSA certificate, you can't use ECDSA, but I wanted to make sure before I ruled out ECDHE-ECDSA.