apt-proxy, apt-cacher, apt-cacher-ng. Which one?

Is one of these package cachers better than the others or is this
another one I should try? I have a number of system installed with
Ubuntu now and like to speed up the update process.
---------------------------------------------------
PLUG-discuss mailing list - PLUG-discuss@lists.plug.phoenix.az.us
To subscribe, unsubscribe, or to change your mail settings:
http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss