Apache/lighttpd or apache with fcgid

I am trying to determine (from people’s experience here) if there is a
benefit to proxying apache -> lighttpd -> rails instead of just using
apache
mod_fcgid -> rails. I am having some concerns of the stability of the
fcgid
apache modules as well as the incredibly painful first connect issue
with
apache mod_fcgid. Is the lighttpd fcgi more stable and mature than
apache ?

Is there a performance hit (or gain) to sticking lighttpd in the middle
of
apache and rails?

thanks
adam