Gentoo linux is all I run for servers and workstations.
Uses a system called portage based off of the freeBSD model (but it's not BSD).
You want to install qmail? you type:
emerge qmail
and it downloads, compiles, and installs it customized to your computer, including all dependencies.
It's installation is not for a total linux newbie though, you have to do some stuff yourself (not dummy-proof).
http://www.gentoo.org