I've been working hard these past few months to create a more balanced, skill-oriented config for players that like both Realism Vs and ProMod gameplay. The result is Dark Havoc (the successor of Realism Throwback).

Dark Havoc offers an exciting, fast-paced gaming experience for players that enjoy a richer, more challenging L4D2 config. Unlike ProMod, Dark Havoc is not stripped down to the bone with a minimalistic approach to competitive gameplay. But I did incorporate elements of ProMod to ensure a more balanced experience.

More info here: http://zka.so/dark-havoc-1-0-released/