Or, if you like, the nginx-Varnish-nginx sandwich.
This is, admittedly, a bit unorthodox. But here’s my rationale:
Since time immemorial (ie. more than a couple of years of Internet time), we at Reveal IT have been deploying Varnish in front of the web sites we build for our customers, with the dual purpose of a faster (and thus better) user experience and conservation of server resources.