This is an excellent write-up in the "advanced" category, I'm glad to see articles like this on the Tavern! Tomaž, at my company we use a similar configuration sans Varnish and Pound. Nginx has all the functionality that Pound has when it comes to SSL and it's built-in FastCGI cache can substitute Varnish. I believe in keeping it simple and I also think that less software means faster response time and fewer points of failure, not to mention hardware resource requirements :)