The beauty of linux is you can write shell scripts to monitor processes.
See this thread
http://social.biowar...7/index/6262791. It's a pretty good example of what can be done with shell scripts.
There are lots of ways to automate the scripts, but that should be a good starting place and a fairly robust system.
As for distros, I don't know that one is better than the other. I've used Fedora, Red Hat, Ubuntu, can't pick off one as better than the other. Small minimalistic footprint is ideal. 64 bit distros may cause you issues with a dinasour app like NWN and nwnX which are designed for 32 bit systems.
My recommendation is Ubuntu, it's the most user friendly and widely used distro these days.
As a note I did manage to compile nwnx and all plugins on a 64 bit ubuntu distro, but it took a lot of fiddling.