Apache DDOS protection

Apache is most a popular web server in the world, also in my company apache is already running on some web servers. Today I've found a module that can protecting apache from DDOS attack, and in internet they called as mod_evasive, please see below:

Migrate from apache to nginx web server

Yesterday I've read about nginx or my friend called nginx is alternate and more powerfull web server.  I've about 10 hardware servers and more than 15 virtual servers currently running on CentOS and OpenVZ and Apache.