I know there are lot of tutorials out there which suggest the use either nginx or lighttpd on port 80 and proxy dynamic requests to apache running on a different port. I am not ready to take that leap yet for my VPS. However I could definitely try the reverse scenario.
i.e. use apache's mod_proxy to proxy requests to nginx/lighttpd running on a different port.
But does that even make sense? will there be a performance gain if I use the reverse setup?